I’ll be a monkey’s uncle

The speaker is so certain of a claim that if he is wrong, he will allow a negro to inseminate his sister.

If I can’t finish this keg stand, I’ll be a monkey’s uncle.

Garth's Uncle

To Tighten something like uncle garth

Person 1: "Whos tightened that up? "

Person 2: "Garth's uncle!"

Or

When tigheting something:
Person "Garth it!"

Cat's Uncle

A lazy person (slacker), who is laid back by nature, and unreliable in general.

Would you hire Bob to clean your gutters for you? Probably not, he can be a bit of a Cat's Uncle sometimes.
Dude my mom's new boyfriend is a real Cat's Uncle, I mean he doesn't do anything!

half-uncle

Parent's half-brother.

My half-uncle is a good person.

half-uncle

Parent's half-brother.

Half-uncle.

Uncle Ben (Byn)

This is when you Boof a Zyn pouch.

Hey Bro.. I got a few extra Zyn's on me.... wanna go full Uncle Ben (Byn) on the way to eat at Panda Express?

phat uncled

The moment you realize your surrounded by a bunch of fat middle aged men trying to be cool.

1. I just got phat uncled in the hot tub

2. As soon as Emma Walked is she was phat uncled by Ron, Brian and Denise. 😂😂