CQC 

Close-Quarters Combat

Same definition as CQB; it's a martial-arts inspired art of hand-to-hand combat. CQC can also be used when you have a flat knife and a handgun equipped at the same time.
The reason a flat knife (such as, say, a Colt Combat Commander) is recommended with a handgun is because, when you're equipped with both at once, and you're engaging in shootouts, you can rest the knife on the grip while holding the gun the way you should be to maintain capability (see gun control). Thus if you suddenly engage in proximity encounter, you can immediately switch between a handgun and a knife.

"CQC is only recommended for special forces personnel. It doesn't work for everyone."
-Motosada Mori

"CQC is awesome, but for me, it would be difficult to memorize ALL the moves. In real-life I mean."
-me

CQC by Dave February 12, 2005

CQC 

Close-Quarters Combat
Relating to heated situations where heavy gunfire is used in popularised locations (grossly cities)
In the late 70's, Any militaristic occurances where combat ensured in large buildings (such as malls or houses) was referred to as CQC. Battles fought indoors often consisted of uneasy navigations through narrow corridors, doorways and staircases, where the two waring parties would kill each other off. This method of combat was labeled "CQC".
Later renamed to Urban Combat, CQC is now widely known as martial arts, mainly muay thai

News broadcast; The CQC that took place today, was a massacre. 10 officers injured, 5 killed. The body count of the perpetrators is still unknown

CQC by Aaron O'Gorman December 28, 2005

CqC 

Usually put in the beginning of the first thread post. Meaning Comments, Questions, Concerns.

"I feel like dying today. CqC?"

CqC by Skinrape July 14, 2009

Space CQC 

Space CQC (Close Quarters Combat) is a fighting style used by Nyaruko, Kuuko, Hasturr, and likely other aliens. Space CQC is a variety of moves involving special abilities, powers, and even ranged attacks used by specific characters. Space CQC most importantly also includes others moves that are indistinguishable from regular hand-to-hand combat you'd see from humans. Many aliens have also extraordinary strength that humans lack giving them an edge with combat.

"From Citizen Bright's Professional Space CQC, That which you believe is Space CQC is Space CQC. However, remember that others may not agree with you."

Space CQC by Professional Dumb Ass August 21, 2021

CQCAF 

Close Quarters Combat Air Five

CQCAF!

CQCAF by Le' Duche October 22, 2009