Bats Foot

The crease in your trousers reveling your boner or normal penis.
"Jesus Christ, check out him hes got a major bats foot in those trousers"
by Jacob_you know who November 02, 2011
Get the Bats Foot mug.

Bat's foot

When your trousers make it appear as though you have an erection.
"You've got a bit of bat's foot going on there."
Get the Bat's foot mug.