This is an urban term used to imply that you plan to beat a person like there mama. Although, the person saying this phrase is not related to them.

1.When you uncle fists you and your sibling at the same time.

2. When your uncle literally punches your ass hole into the next dimension.

When you really like someone so you take them hostage in your moms belly.

The headache you get the morning after drinking the cheap vodka, Smirnoff.

an uncle smudgey is when a person fingers there asshole to get shit on their fingers then you rub it in a poor innocent bitches face therefore you uncle smudgeyd someone

A CURSE WORD(verb)
when you cant find a good word to curse
Angry at someone(noun)

Everyone's estranged uncle who likes to cleverly touch his adolescent nieces where he probably shouldn't, usually in the form of a seemingly innocent pat on the ass or thigh.