Having sexual intercourse with 2 people at the same time
Last night i had a threesum with these to chicks
by Raynersdfgcvb June 11, 2006
Can you define these popular missing words?
Sexual intercourse between three people, usually hotter when three girls.
After hanging up on a Skype call, a threesum is usually what partakes as a nighttime activity
by iMindfreak October 30, 2011