Yo is very free, and morphable. Not a gen z word, such as rizz, or goofy ahh. But yo can be used like Yo. or yo? Such as Ay yooooo? When your friend says something sus.
Abbreviation for years old. 18 year old= 18-yo
I have an 18-yo daughter.
The way you say “hi” when trying to act cool but your really not.
Person 1: yo.
Person 2: stop trying your nit cool get over it