Top definition
1. To engage in pre-adolescent hijinks that generally annoy stodgy adults who were raised in a different time.
2. To ass-rape someone in the shower.
"Why is everybody so upest with what Jerry did, all i heard he did was horse around with some kids at camp?"

"Yes, but the bad kind of horsing around."

"Oh, Jesus."
by martin grammatica November 17, 2011
Happy St. Patties Day!