A way to say "Yeah" quickly. It can be used to express agreement or excitement. It originated from the way Ariana Grande pronounces "yeah" in her songs, and is now usually used by most Arianators, but sometimes also by non-Ariana Grande fans, although never used by haters.
A) How to say yes in a more casual way.
B) A word used in speaking and singing popularised by Ariana Grande.
C) What Ariana Grande says in every song she makes.