butt bicycle
When a girl is on top of a guy riding up and down his penis
Donna was really riding me like a butt bicycle last nite
Bicycle Butt
An ass so large and with such deep ass cleavage, one could park a bicycle tire in that ass crack like one would use a regular bike stand.
Whoa, look at LaQuisha's bicycle butt ! I could park my mountain bike huge knobby front tire in that ass cleavage.