person is really you're 2nd cousin but you call them uncle cousin because they are much older than you and because your mom or dad act like siblings
My Uncle cousin Joey is taking me to the playground.
by phillybuzz215 August 20, 2015
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A spiritual term used to describe the ceremonial use the of the drug Ketamine.
ME: Is uncle cousin with us tonight?

HIM: Oh yes, dear brother, he is indeed.

Me: My dear brother, may I get a little puff-ski of that uncle cousin?

HIM: May the lord be with you.
by thedearestbrother March 28, 2022
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A nice way of saying FUCK in polite company.
Oh father, uncle, cousin Kate! There's no one to drive me home, and the bus drivers are on strike!
by pentozali January 30, 2011
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Son of their great-grandparent’s half-sibling with the other great-grandparent’s full sibling.
My sesqui-first great-cousin-uncle is a good person.
by Hgcloziw November 23, 2019
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