Who Is you meaning

[Faoline]

First I hope I'm in the right place. But I've been watching a lot of tournament videos. And every time someone of high caliber like mango or armada starts to make a comeback from match point the commentators start talking about is this a who is you moment? So my question is is where did that originate from? And what does it truly mean

 

[Faoline]

Bump ppppppppp

 

[20YY SS | Saiblade]

When Armada was young and couldn't speak English well, he would ask "Who is you?" (Trying to say "Who are you/What's your name?") and people thought it was smack talk. Also, just a word of advice, don't bump your own threads unless it's an event, specially not in the same day.