New Sibling

when you meet someone, who you get along with great, and you find out that you have the same names. a very rare coincidence.
usually between a guy and a girl who share names, (like sam, page, eric, jordan etc...)

person 1: man i've really been enjoying talking to you, but you still haven't told me your name.
person 2: ohh its sam.
person1: MINE TOO!!
person 2: you are totally my New Sibling!!!

by justin blue cheese December 22, 2008

Nicaraguan Sibling Surprise

Two toddler siblings take a shared bath. While one contentedly entertains himself, the other stands up behind him and urinates on him.

I only turned my back for a second; when I turned around Manual had initiated a Nicaraguan Sibling Surprise on Isabella. She lucky that he only peed on her back.

by Crack Jacky September 2, 2009

Pinky Siblings

When two people have kissed the same person, the later person has the first persons spit.

Jennie kissed Dylan who was Sarah's ex-boyfriend. Jennie and Sarah were then pinky siblings because Sarah had Jennies spit.

by 3bunny June 19, 2011

Oil Siblings

Special bond between a guy and a girl created after both of them have had, alternatively or simultaneously, sexual intercourse with the same girl.

-Hey, Monica, guess who I tapped last night!

-Who?
-Jessica!
-No way, I did her last month. We're oil siblings!

by Oyster Lover February 1, 2016

cock siblings

Two chicks that fuck the same dude

"Jenny you fucked Kent last week ?" "Well, I slept with him last night. So, does that make us cock siblings?"

by Skier chick September 7, 2016

lee siblings

They're the best siblings in the world, like the Oxford dictionary said "Lee Siblings : the best siblings. If you want to call your siblings goals, use Lee first."

"I have a Lee Siblings. They're goals af."

by Jejujo July 10, 2017

Eldest sibling syndrome

Eldest sibling syndrome or E.S.S is When you are the eldest amongst your siblings so you automatically fall into the cycle of having to use things until they are disintegrating because you can't ask for new ones.

Whereas on the other hand any younger sibling can ask for whatever and get it instantaneously because they are not the eldest.

Examples of this include tattered clothes and using things until they break.

Person 1: Dude. Your underwear is literally hanging by the elastics. Why don't you get new ones?

Person 2: Oh you know why. Ask my little brother.

Person 1: No wait. Don't tell me you have Eldest Sibling Syndrome!?
Person 2: It's gotten worse

by Mad King JJ July 29, 2017