Stay Frisé is a French expression that means to keep it funky and fresh even a bit weird.
In French, Frisé means curly but is recently used when speaking of something cool.
You could also use the sentence when leaving a room, like "stay fresh fellas".
Oh la la, ça c'est très frisé.
Criff, y'est bin frisé lui.
Stay frisés les chums.