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1.
CCW
CCW stands for Carrying a Concealed Weapon. The majority of States (33) in the USA allow citizens to apply for CCW permits, which normally applies to handguns.
You currently can't get a CCW permit in Illinois, but the NRA lobby has proposed a few bills this year to change that.
by Odin April 02, 2005
 
2.
CCW
"Constructed Criticism Welcome" often seen in captions for original artwork online, like on DeviantArt, or in the description of a fanfiction.
Content Creator: "Here's a picture I drew of my dog. CCW!"

Viewer: "Looks great so far, but the shading needs work. Keep practicing."

Content Creator: "Thanks"
by weareallhomos July 02, 2013
 
3.
ccw
Concealed Carry Weapon.
A state permit allowing a person to carry a loaded concealed pistol.
I pack my CCW and my M1911 A1 ACP so don't fuck with me!
by Diane aka the BITCH July 02, 2005
 
4.
CCW
A girl who really craves the cock hence the acronym CCW (Cock Craving Whore)
Man that bitch can't get off my dick, fuckin CCW
by Derek Gross and Kyle Scheidel January 08, 2009