For teenagers, it's a word without much meaning.
It's used to express sudden excitement or spontaneous behaviour.

It's a word that is said (or mostly shouted) after a certain action has been done, it's not used in a sentence.

When life is too hard, and you realize that suicide is the only option.

Yeet can mean anything.

to throw

Term used to express excitement; especially used in basketball when someone has shot a three-pointer that they are sure will go in the hoop.
Also used as one ejaculates.
Can be used as an exclamatory (YEET!), or a verb (to yeet someone)

Shooting someone, runs out of bullets.

This Bitch is empty,"

Throws gun.

"YEET"

To throw an item and say yeet