It's when someone goes down holding his ankle & his foot is pointing in the wrong direction. Happens about once every 2 1/2 years.
You'll be like, "Holy shit! His foot is all bent sideways!" and he'll be like, "Aghhhhh! My fuckin' ankle!!!", and I'll be like, "see, that's Mookfoot"
by Moges February 6, 2014
Get the mookfootmug.