Personally, if I said to someone "Hey, you look fit", I would mean they look ENERGISED while doing a task. But I've listened people speaking in various contexts.
"Hey, you are sexy." = You're fit. (Give me a shoutout for this)
"Damn you look hot/amazing/fantastic/..
= You're fit. ;)
"Hey, great muscles." = You're fit.
"Hey, you look in good shape" = you're fit.
And so on...
Let's see how you would interpret when you hear someone say YOU LOOK FIT?
What does it mean when someone says "you look fit"?
You used to be fat, but now you're not (as fat as before).
The only fitness that masters is the metabolic fitness.
Healthy.
Have you been working out?
You can move that microwave from one counter to the other without losing your breath? Wow, you're fit!
in the UK, it generally means 'you look attractive'
they are jealous or want to fuck you