What does bat brain Batbrain mean?

bat brain Batbrain meaning in Urban Dictionary

a move really composed from batwing, a cruel joke, mainly done-by various other teenagers, for which you bring your scrotum, distribute half of your sac out with your hand, and cup another nut within hand like a brain. takes a while to have appropriate, but when carried out, is preferable to the batwing A Batman lover just who always has actually Batman on brain.