A tu7tle is an internet warrior, who disobeys the laws of 1337 (leet) speak. As you can see, instead of there being an 'r' there is a '7'. Usually a 7 would represent a 'T', so he has clearly failed here. This is why he isn't known on youchoob.
"Hey Steve! Have you seen Tu7tle's new montage?"
"Don't you mean Tur7le? lol"
"No, he's pretty retarded. The 7 is an r"
"Oh lol"
Tsrtle is probably the fattest clown I’ve ever meant. This obese minor has a used tampon for a head and the ability to push a substitute teacher to the bring of death! It doesn’t help his name is a Teagan... which is a girls name!
“Hey do you know Tsrtle?”
“Oh you mean the obese kid with the big Afro on his head?”