Top definition
The female version of cock blocking. When one girl cock blocks another girl.
As Jan was trying to seal the deal with Stew, Jennifer acted like a Muff Muter by walking by and saying "Glad to see the herpes aren't flaring up as much."
by MrZero May 18, 2009
Get the mug
Get a Muff Muter mug for your daughter-in-law Riley.