Cup Twins

When two people sexually share a cup which they use to poop in.

My sister and her girlfriend are Cup Twins

by Emberthrive May 9, 2025

cup twin

When a friend becomes a best friend then a boyfriend from sending talking videos one night on snapchat with a cup down their top and shorts. The two people then might decide to call themselves cup twin.

Hey Cup twin
I love yoou Cup twin

by Dixiedust1336 May 6, 2019