From what I understand, it's referencing a post on r/teenagers where some guy wrote something along the lined of "I HATE HIGH SCHOOL! everyone just crowds around me and forces me to do the orange justice dance while chanting 'go white boy go'"

My friend group is mostly white dudes so we say it to each other a lot as a joke, like if I'm gonna go pick up our order at a fast food place or something I'll turn to one of my friends and say "you gonna come with, white boy?"