When your in the bathroom stall and you hear someone taking a shit. It sounds like a wrinkle coming out of their ass.

Elderly folk; sometimes shortened down to "wrinkle bisc".

In the theme of 'white papers' & 'non papers', wrinkled papers are documents containing falsehoods.

See Scrotum

Yet another word for your ass hole.

A fart so nasty it makes your butthole wrinkle

When a man's penis is rubbed in and out of someone's wrinkles.