Why do Americans all say "Wassup bruh" in fights?

[Anonymous]

After watching quite a few YouTube videos I noticed they mostly say that, why? Lol.

[DJohnny]

Those videos are probably of stereotypical idiots. I've never actually heard someone say that in person when they fight. I've heard people say it when they are joking making fun of it but never when they are serious.

[Saoirse_Nua]

Sounds like the fight is faked - You would never say that in a real fight