Flesh Collision
The act of one's thighs/belly/ass-cheeks ramming against their partner's body parts during intercourse, producing a loud smacking sound.
Also synonymous with high five.
Also synonymous with high five.
The flesh collision of my girlfriend's ass cheeks and my thighs kept our room-mate up all night.
Flesh collision, bro! *High-five*
Flesh collision, bro! *High-five*