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1.
(verb, noun) A method of torture to invoke as much physical or mental pain on a victim as possible. This can be a variety of actions, from deprivation of something dear to the victim, or the victim eating his own leg contained in a cardboard box.

The word originated as a variation of "throws" in a conversation between a Gondwarfian and an elf. Later defined as a method of forbidden torture.
Just the thought of the thros struck fear into the hearts of the villagers!

I will thros you into submission!
by Justin Gagen July 03, 2005
 
2.
one of those people. also known as "thra".
My mom says I can't hang out with her anymore...she's a thro...

THRO!!!
by the original thro December 08, 2008
 
3.
it means tight
mann fu did u see that new 2pac movie "ressurtion" it was thro dan a game
by vicktoria November 18, 2003