jackin flaps
When two ladies grind their crotches side to side like a couple of raccoons fighting over a sandwich. It's pancake flaps on the grill, but with more sweat and less syrup.
They were jackin flaps in the back of the bus like it was a private party.
I walked in on my mom and her friend jackin flaps in the kitchen.
He DM'd me, 'Your aunt and uncle are jackin flaps at the grocery store.'