When someone makes a threat, usually involving violence, on an anonymous chat, forum, or other text based web communici.
It's great when you're mad and you type it, but later when it is read you see how much it sucks.
Webthreat example
Jaime Choo the JUBU says: NKOTB SUCK BALLS
NKOTB's biggest fan says: Dude, shut up or I'll kick your a**
Jaime Choo the JUBU says: Whatever man, they suck. I'm sorry... the truth hurts I know
NKOTB's biggest fan says: Dude... You're dead. I'm totally looking up your IP adress and FINDING YOU