whim fab Share definition Flag A whimsical fabrication, aka when someone comes up with an overtly hyperbolic or disengueous statement that couldn't possibly be true. "Ya bro last night I easily had 20 drinks at that bar and also got at least 3 girls numbers." - No way man that's a whim fab forsure! whim fab by Coballttt November 5, 2025 Get the whim fab mug.