A fork of Rural Dictionary
A spoken colloquialism that existed pre-internet, despite what many people claim. "Prolly" is a clipped pronunciation of "probably"; compare with "g'day" as a clipped pronunciation of "good day", or "gonna" as a common spoken shortening of "going to". Certainly non-standard, but not necessarily indicative of the writer's laziness. For some, writing in this manner mimics their natural speech pattern/dialect.
She said she'd prolly come over after she's finished relaxin' at the beach. (spoken example) "I'm prolly gonna head down to Toranna {Toronto} for the May 2-4."