yo, seta is a person on irc who is like "i am the l33tz. my boyfriend's name is colipso and uh....turtle powa!" okay so anyway when u call someone a seta, you are calling them the crusty semen you have on the dick of ur head when u beat off
colipso: seta i lubz u
seta: handjob bitch
colipso handjobz seta
colipso: ur penis, ur penis!
seta: i am jizzing
colipso: look, seta, there is some seta left on ur dick five minutes later
oh yeah five minutes passed so it dried up