What is yap yap yap?

When someone is so dumb they think they are smart. In turn all you hear when they speak is yap yap yap

Hey bill you dumb sweaty fuck did you spend your whole check at pf changs again..... yap yap yap

yap yap yap - video

Yap-yap-yap means to talk with your friend(s) until told/asked to by an annoyed person of the yapping

Teacher: "You girls over there better stop that yap yap yap before I come over there and make you!"