Prolly (slang) Type: adverb, slang Pronunciation: /pruh-lee/ What does Prolly mean? Probably. Prolly is slang for probably. Prolly Synonyms: Def Example sentence: “I should prolly cop 2 new pairs of G Fazos.” Prolly in songs: “I’m prolly with my jeweler playin’ freeze tag” – Nicki Minaj, Good Form. “I’ll prolly die anonymous, I’ll prolly die with […]