diff --git a/hgext3rd/fbamend/movement.py b/hgext3rd/fbamend/movement.py
--- a/hgext3rd/fbamend/movement.py
+++ b/hgext3rd/fbamend/movement.py
@@ -33,7 +33,9 @@
 
 @command(
     '^previous',
-    [('', 'newest', False,
+    [('', 'clean', False,
+      _('discard uncommitted changes (no backup)')),
+     ('', 'newest', False,
       _('always pick the newest parent when a changeset has multiple parents')),
      ('', 'bottom', False,
       _('update to the lowest non-public ancestor of the current changeset')),
@@ -48,7 +50,9 @@
 
 @command(
     '^next',
-    [('', 'newest', False,
+    [('', 'clean', False,
+      _('discard uncommitted changes (no backup)')),
+     ('', 'newest', False,
       _('always pick the newest child when a changeset has multiple children')),
      ('', 'rebase', False, _('rebase each changeset if necessary')),
      ('', 'top', False, _('update to the head of the current stack')),
@@ -99,17 +103,23 @@
             raise error.Abort(_("cannot use both --bottom and --bookmark"))
     if opts.get('towards', False) and opts.get('top', False):
         raise error.Abort(_("cannot use both --top and --towards"))
+    if opts.get('merge', False) and opts.get('rebase', False):
+        raise error.Abort(_("cannot use both --merge and --rebase"))
 
     # Check if there is an outstanding operation or uncommited changes.
     cmdutil.checkunfinished(repo)
-    if not opts.get('merge', False):
+    if not opts.get('clean', False) and not opts.get('merge', False):
         try:
             cmdutil.bailifchanged(repo)
         except error.Abort as e:
-            e.hint = _("use --merge to merge uncommitted changes")
+            e.hint = _("use --clean to discard uncommitted changes "
+                       "or --merge to bring them along")
             raise
-    elif opts.get('rebase', False):
-        raise error.Abort(_("cannot use both --merge and --rebase"))
+
+    # If we have both --clean and --rebase, we need to discard any outstanding
+    # changes now before we attempt to perform any rebases.
+    if opts.get('clean') and opts.get('rebase'):
+        commands.update(ui, repo, rev=repo['.'].rev(), clean=True)
 
     with repo.wlock(), repo.lock():
         # Record the active bookmark, if any.
@@ -133,7 +143,8 @@
                 _setbookmark(repo, tr, bookmark, target)
 
             # Update to the target changeset.
-            commands.update(ui, repo, rev=target)
+            commands.update(ui, repo, rev=target,
+                            clean=opts.get('clean', False))
 
             # Print out the changeset we landed on.
             _showchangesets(ui, repo, revs=[target])
diff --git a/tests/test-fbamend-next.t b/tests/test-fbamend-next.t
--- a/tests/test-fbamend-next.t
+++ b/tests/test-fbamend-next.t
@@ -20,6 +20,7 @@
   
   options:
   
+      --clean                discard uncommitted changes (no backup)
       --newest               always pick the newest child when a changeset has
                              multiple children
       --rebase               rebase each changeset if necessary
@@ -134,6 +135,26 @@
   (leaving bookmark bookmark)
   [c8d03c] (top) r5
 
+Test dirty working copy and --clean.
+  $ hg up bottom
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (activating bookmark bottom)
+  $ touch test
+  $ hg add test
+  $ hg st
+  A test
+  $ hg next
+  abort: uncommitted changes
+  (use --clean to discard uncommitted changes or --merge to bring them along)
+  [255]
+  $ hg next --clean
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (leaving bookmark bottom)
+  [66f7d4] r1
+  $ hg st
+  ? test
+  $ rm test
+
 Test dirty working copy and --merge.
   $ hg up bottom
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
@@ -144,7 +165,7 @@
   A test
   $ hg next
   abort: uncommitted changes
-  (use --merge to merge uncommitted changes)
+  (use --clean to discard uncommitted changes or --merge to bring them along)
   [255]
   $ hg next --merge
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
@@ -193,7 +214,6 @@
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     r0
   
-
   $ hg next --top --newest
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (leaving bookmark bottom)
diff --git a/tests/test-fbamend-nextrebase.t b/tests/test-fbamend-nextrebase.t
--- a/tests/test-fbamend-nextrebase.t
+++ b/tests/test-fbamend-nextrebase.t
@@ -58,6 +58,31 @@
   |/
   o  0 r0
   
+Test --clean flag.
+  $ touch foo
+  $ hg add foo
+  $ hg status
+  A foo
+  $ hg next --rebase
+  abort: uncommitted changes
+  (use --clean to discard uncommitted changes or --merge to bring them along)
+  [255]
+  $ hg next --rebase --clean
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  rebasing 3:137d867d71d5 "r3"
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  [7d603c] r3
+  $ hg status
+  ? foo
+  $ showgraph
+  @  6 r3
+  |
+  o  5 r2
+  |
+  o  4 amended
+  |
+  o  0 r0
+  
 
 Rebasing multiple changesets at once.
   $ reset
diff --git a/tests/test-fbamend-previous.t b/tests/test-fbamend-previous.t
--- a/tests/test-fbamend-previous.t
+++ b/tests/test-fbamend-previous.t
@@ -17,6 +17,7 @@
   
   options:
   
+      --clean                discard uncommitted changes (no backup)
       --newest               always pick the newest parent when a changeset has
                              multiple parents
       --bottom               update to the lowest non-public ancestor of the
@@ -109,7 +110,7 @@
   A test
   $ hg previous
   abort: uncommitted changes
-  (use --merge to merge uncommitted changes)
+  (use --clean to discard uncommitted changes or --merge to bring them along)
   [255]
   $ hg previous --merge
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
@@ -117,3 +118,14 @@
   [bebd16] r4
   $ hg st
   A test
+
+Test dirty working copy and --clean.
+  $ hg previous
+  abort: uncommitted changes
+  (use --clean to discard uncommitted changes or --merge to bring them along)
+  [255]
+  $ hg previous --clean
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  [2dc09a] r3
+  $ hg st
+  ? test