What you say after your barber asks if you liked the messed up cut he just gave you and pushed your hairline back.
barber: you like it?
mind: aint no way he just did that to my head!! I look ugly as f*ck
you: yeah
what my brain says in a conversation when it can think of anything else
Other Person - *shit I don't care about*
Me - yeah
A word used when you have absolutely no idea of what others are talking about, usually accompanied with a stupid look and a half open mouth:
Jeff: a seyfert galaxy, 65789000978765 million light years away from us was swallowed by the 43001 black hole, 6556378 years ago!!!!
Joe: yeah, yeah!
Person 1: H2O yeah!
Person 2: What, do you have a water kink or something?
Person 1: Yes... You could say it makes me, wet