"Ayy" is an expression of greeting, most likely coming from the word "hey". It is mostly used in ghetto culture, or by people high on marijuana, and can also be used as an insult or mockery.
1. when said in a calm, appreciative tone, “ayy” means thank you.
2. when said in a high pitched, loud way, “ayy” means that you got fouled on your way to the hoop.
3. when said in a loud but deep voice, “ayy” can be used as a celebration, or, as a background for a rap song.
1. *friend passes blunt* you: “ayy”
2. *sibling pinches you* you: “Ayyy!”
3. *the squad when the homie bags the baddest girl at the party* everybody: “AAYYYYY”