face-crotch
When you stick your face in someone's crotch, or they stick theirs in yours. It's like the worst kind of licking, but with more shame and less respect.
My mom face-crotched my dad during the holidays. It was like a family tradition.
He face-crotched the waiter. The waiter left in tears.
They face-crotched each other in the back of the bus. No one else got on after that.