a <3
It’s when someone’s butt gets penetrated by another butt. The first 3 is the girl’s butt, the - is the guy’s junk, and the last 3 is the guy’s face as he gets stuffed.
My sister told me her boyfriend did a #3 on her. I threw up.
My dad did a #3 on my grandma. She just smiled and said 'I've had worse.'
My crush did a #3 on me and I cried like a baby.