When you run your finger down your Buttcrack and get the sweat and leftover chodes, And then proceed to wipe it on another persons upper lip.
by Anonymous June 30, 2003
Such as; "Watch out for that moondip!" or "Did you see him on the dance floor? He was doing the moondip" or "we were in bed last night and he moondipped me, gonna try that again."
by moondipper July 11, 2010