l33t haxx0r
A loser who uses fake usernames and talks like he's hacking the Pentagon, when really he just can't beat his mom at Mario Kart.
He posted 'I 337 haxx0r 4 realz' in the comments of a video about how to beat a 10-year-old at Fortnite.
He DM'd me 'u noob 4get 2 pwn 2 1337'
He tried to flirt with a girl by saying 'u r 1337 4 realz' and she laughed in his face.