Definition of "prolly"

Take or be taken. Get yours or get got. It was the code of the streets and I'd lived by it. The way things was looking, I was prolly gone die by it too.

2006, Noire [pseudonym], Thug-A-Licious: An Urban Erotic Tale, New York, N.Y.: One World, Ballantine Books, page 24

Naw. That stream's so lazy, it prolly wouldn't even float thee.

2006 April 24, Videlectrix, Thy Dungeonman 3, Browser, level/area: Bridge which looks troll-friendly

Prolly wouldn't be stopped by da cops all da time, even though I ain't doin' nothin' wrong. Prolly wouldn't have my teachers tryna put me in special ed all da time. And prolly would be in the Gifted and Talented Program wit' you and Echo.

2020, Echo Brown, Black Girl Unlimited‎, Henry Holt and Company

"There's prolly good parts of the province. Only good part of the town is it's easy to sneak into the abandoned movie theater and throw expired Milk Duds to the rats."

2022, Jeph Jacques, Questionable Content (webcomic), 4907: Sasratchewan