Oh Yeaah..

Origin
While playing Disney Infinite 2.0 on stream, Anthony (Katie) expressed their undying love for a sleepy Geoff at 3AM who responded with the new classic: "Oh yeeeah".

Creator(s)
Geoff, feat. Katie

Usage
It is now the standard response given anytime someone says "I love you" and has become more iconic than Han Solo's famous "I know" from "The Empire Strikes Back".