diff --git a/README.md b/README.md
index 864b60a..d409c75 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 
 - [Checkout Old Version Of A File](git/checkout-old-version-of-a-file.md)
 - [Checkout Previous Branch](git/checkout-previous-branch.md)
+- [Clean Out All Local Branches](git/clean-out-all-local-branches.md)
 - [Delete All Untracked Files](git/delete-all-untracked-files.md)
 - [Dry Runs in Git](git/dry-runs-in-git.md)
 - [Intent To Add](git/intent-to-add.md)
diff --git a/git/clean-out-all-local-branches.md b/git/clean-out-all-local-branches.md
new file mode 100644
index 0000000..d7d5621
--- /dev/null
+++ b/git/clean-out-all-local-branches.md
@@ -0,0 +1,17 @@
+# Clean Out All Local Branches
+
+Sometimes a project can get to a point where there are so many local
+branches that deleting them one by one is too tedious. This one-liner can
+help:
+
+```
+$ git branch --merged master | grep -v master | xargs git branch -d
+```
+
+This won't delete branches that are unmerged which saves you from doing
+something stupid, but can be annoying if you know what you are doing. If you
+are sure you want to wipe everything, just use `-D` like so:
+
+```
+$ git branch --merged master | grep -v master | xargs git branch -D
+```