Definitions by kaixbi

Fsl

A casual texting abbreviation meaning “for so long.”

Used when you want to emphasize that something took an unusually long time, often with mild frustration, sarcasm, or dramatic flair.

> “Bro this update was downloading fsl 😭”
“I haven’t seen you fsl, where you been?”

Fsl by kaixbi December 19, 2025