siamese twinning

When you are being cock-blocked so hard by a girls friend that she doesn't leave her side the whole entire night.

Guy: Yo, did you get with Emily last night?
Me: No man, she was siamese-twinning with Lily the whole time.

Two men who share the same month they both last had sex.

(n.) Twins joined toghether, sharing body parts or areas. Often, they share vital organs or limbs, and only one can survive. The origi is a pair of 19th cent. siamese babies that lived to be 70. They stayed together for thier entire lives, and even married twin sisters (not identical). They moved to the united states in the 1830's and worked in a circus. They eventually became farmers.

A sexual act by which a man cums on girl1's face and then sticks girl2's face to girl1's. The semen acts as a glue and the site depicts that the girls are siamese twins.

When you insert your body into a girl's asshole so your head is the only thing that sticks out.

twins freakishly conjoined at birth

A game which is played by two males or females in which the participants where a XXXXL sweater and cover themselves with a comforter whilst pretending to be Siamese Twins and engage in the act of mutual masturbation. This raises the question: 'When Siamese Twins rub one out is it an act of masturbation or incest?'. Either way is is a rather disgusting act meant for homosexuals.