A fork of Rural Dictionary
Having sexual intercourse with 2 people at the same time
Last night i had a threesum with these to chicks
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
Sexual Intercourse involving a male and 2 women. intercourse involving 2 males and 1 women is a train.
The crowd began to advance upon the Threesum, and Omally was in the vanguard. By then the Threesum was already past its prime.
Day when a girl gets tagged teamed by two males
National threesum day is the hottest