Top Definition
fit bit - someone who's hot. . and fit to boot - a bit of alright.
"my boyfriends a proper fit bit"
by Laura (prom) December 15, 2006
Slang for an attractive person. Came into prominence in the nineties and currently having a resurgence.

Also used as a flirtatious greeting;

"Alright fitbit?"
"Do you like Katie?"
"Yeah she's a proper fitbit."
by Dr. Scranny Fatchen November 04, 2015

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