Son of their grandparent’s half-sibling with the other grandparent’s full sibling.
My sesqui-first cousin-uncle is a good person.
by Hgcloziw November 23, 2019
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Pervert. Someone who enjoys touching small children inappropriately. A code word two friends use to talk about pedophiles and disgusting child touchers when they are in public as to be conspicuous.
"Ewww... see that old guy holding that little girl--- He is totally an Uncle Neddy!"

"Don't let him near your child! I hear he is an Uncle Neddy!"
by JazzyPants February 23, 2012
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Lori Lightfoot's wife is a total Uncle Tyrone for allowing Lori not to interview white people.
by Oswald Joy May 27, 2021
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The one person who drinks more than 5 cans of beer per day and room full of porn magazines and is also known as the boracho
Just ask your Mexican friend about Mexican uncle
by Wiki word June 2, 2014
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The headache you get the morning after drinking the cheap vodka, Smirnoff.
"I can't come to work today, Uncle Smirny has come to visit,"
by one groovy chick May 18, 2016
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