Merriam-Webster posted the definition of "Yeet" after Jey Uso won the Royal Rumble. "What?" and "Yeah" are easy enough ...
Yeet: A fluffy slang word with two definitions ... with a Vine video of a girl throwing a soda can down a hallway while yelling, “This b---- empty! Yeet!” Then, online gamers came along.
Speaking on "Nightcap," Uso explained that most of his family has been using "Yeet" on WWE television for a long time, and that the origins of the phrase has always been apart of west coast slang. " ...