Slang

Terms created, or repurposed (typically by younger folk) to describe various experiences within a given culture or subculture.

Urban Dictionary defines various slang words.

That house party was lit! (It was not actually on fire, but in this case the word 'lit' is used to describe that the party was fun)

Eyebrows on fleek! ('Fleek' is used here to describe that the person's eyebrows look good)