Knights of the round table

An orgy with men and/or or women with strap ons, where everyone gathers around a round table, naked, with one person on the table. The people around the table take turns fucking the one in the middle

Hey Mary, are you sore from that session of Knights of the Round Table last night?

Round Rubbing

Depending upon context, it is either (1) The lesbian equivalent of circlejerk, or (2) the lesbian equivalent of circle jerkle

The all girls camp was a mess! The counselors walked in on a round rubbing!

round teeth

bullets, especially from a rapper

Ludacris:
Bullets gather 'round
Then i shoot rounds of round teeth