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1.
The combination of the slang form of the word burn: to disrespect someone (to diss); to make fun of someone; typically used by a third party after a first party makes fun of a second party, with that of the slang definition of the word sick: something crazy, cool, or insane in which an individual has never seen or experienced before.

The word was originally coined by ROOTDestiny, a professional Starcraft2 gamer, referring to the disrespecting of an opponent, using tactics unfamiliar; uncommon, unseen or never experienced before by that opponent and/or viewers.
RootDestiny’s subterranean assault video was so burnsick!
by Basho June 21, 2011
 
2.
An adjective invented by the Starcraft 2 Professional Gamer Steven Destiny Bonnell, commonly used after an extraordinary feat; such as crushing an opponent's entire army.

1. Extremely Impressive; inspiring shock and awe.
2. A victory cry
3. Demonstration of utter dominance.
This kid's going to get ling rushed, burnsick!
by d(O.o)a June 21, 2011
 
3.
To humiliate your opponent in an awesome fashion.

A contraction of burn and sick.
Steven shouted, "Oh, burnsick!" after winning a game of volleyball, 3-0.
by SlayerS_Grack June 09, 2011
 
4.
When something exciting, amazing, or gloat worthy has happened. Often used throughout moments of victory.
Winston Churchill: "Yesterday morning at 2:41 a.m. at Headquarters, General Jodl, the German High Command, and Grand Admiral Doenitz, the designated head of the German State, signed the act of unconditional surrender of all German Land, sea, and air forces, BURNSICK"
by Eggman198 June 21, 2011
 
5.
A statement used in moments of excitement; such as when Steven Bonnell II rolls a stream-cheater's army for a ladder win.
"BURNSICK bro," Col.Catz
"That burrowed-roach base snipe was so BURNSICK".
by MissingNo_1 June 21, 2011
 
6.
A burnsick is a term used by the popular Starcraft 2 player, Destiny. This term is referring to a strategic play that either undermines the enemy player, or wins the game.
When he attacked with colossi, I countered with infestors, it turned out to be a burnsick, winning the game.
by Lowping.905 June 21, 2011
 
7.
A word used by Destiny, Starcraft 2 professional gamer; to describe an action of epic proportions. To completely humiliate another player in a Starcraft 2 match.
Destiny: Yeah, I just destroyed your army with lings and infestors. It was burnsick.
by ISpawnDeath June 21, 2011