When you want someone to know that you say no to something, but want to do it extremely sarcastically. Comes from an old vine, in which a guy simply says "haha yeah man" to the camera. It is VERY important you say is sarcastically like in the vine, because if you don't, it can be misunderstood by normies as simply saying "yes"
by The Haha-Yeah Man May 21, 2019
This is what you say when you are either confused by something or you yourself are trying to confuse somebody.
Guy 1: Hey man, I just found out that Grandma died. The funeral is on the 5th. Grandpa is devastated.
Guy 2: Haha yeah man!
Guy 1: What?
Guy 2: Haha yeah man!
Guy 1: What?
by Bazog December 11, 2022