“benis” is Slang used by marching band members (AKA ‘Band Kids’) that refers to the illusion of a bulge created by the creasing of the bibbers (uniform overalls) at the crotch area. Short for ‘bibber penis’
Slang used by band kids (marching band members) to refer to the illusion of a bulge due to creases in the bibbers (uniform overalls) around the crotch area.