The unwanted/unexpected insertion of a finger into someone else's butthole. This may be attempted on an unsuspecting person regardless of their state of dress. The aim is to attempt to stick one's digit as far as possible into another's butthole before they have time to clench/react.
I bent over to pick up the remote and she slipped me the unsolicited. Ye-ouch!
by tinogrrl January 14, 2011