When your outfit for the day is 100% on point, it is abbreviated as a "fit."
Rachel's fit was an old nasty child throwin' a fit in the store fit.
Mostly used by young people in Dublin fit means that you’re good looking or a feek
Fit is another way of saying outfit but shorter
“Nigga you like my fit” or
“My fit is going crazy simple”
The British way of saying hot or cute
Person 1: Checks that fit girl over there mate
Person 2: Oh she’s well fit