Twin Piston

When a male wears a strap-on backwards and proceeds to have sex with two women at the same time. One in front and one behind

Bro, my ex called me last night and wanted to have a three-way with her best friend. Needless to say, I brought out the twin piston

by sthrock4 May 4, 2017

Home Twin

A male or female you feel like is your sibling.

Me and my home twin, stayed up all night partying. fam ride or die

by Trill_Queen_<3Areil August 20, 2016

twin rulebook

**MOST IMPORTANT RULE:

ALWAYS vote for your twin if they're running for sophomore class treasurer. no matter what. and use this as proof that you have to.

"Hey, I heard your twin is running for treasurer."
"dude I know. I have to vote for him. It's in the twin rulebook"

by twintwintwin May 20, 2010

parasitic twin

In medical circles can refer to twin reversed arterial perfusion, or a subset of conjoint (siamese) twins. Two fetusii develop conjoined, but one (the parasite) does not fully develop and is wholly dependent on his host brother.

In team management refers to a redundant slacker who performs an identical, complete subset of the effort performed by a more capable worker.

a: we have the same job! we're like siamese twins!

b: nah, I do twice as much. you're a parasitic twin

by justsomerandomdude October 14, 2009

Hungry Twins

The act of two individual’s sexually suckling both breast’s of a woman at the same time resembling two hungry twins fresh out of the womb.

My boy and I totally went hungry twins on that girl last night before we double teamed her.

by Lip Flanger 69 July 7, 2018

Twin-Chan

An awesome friend who might as well be your twin.

You're my twin-chan.

by Ramona6437 December 20, 2010

Mclain Twins

They don't take any showers and they don't wear deodorant. They are some of the worst people at singing ever possible. Sometimes they are smart but most of the time they just door smak u. They may also ask you if you play pub-g

The Mclain Twins Smak u.

by Bigpp2000 February 25, 2020