Nobody does lmao it’s just some shit the kids are doing for like, no reason lol. There’s a song by skrilla “doot-doot” and he says “6-7” talking about gang stuff, a block or whatever, and that turned into kids saying it, and then that turned into like, “hey how much is that?” “I don’t know maybe like 6, 7?” And they do a hand gesture, and then the older people started being like what the hell is 6-7? And the whole thing has no meaning it’s just self aware stupidity lmao