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1.
C3
C3 stands for Tha Carter III
Lil Waynes Album
When me and my True Friend Rebekah Rube get home we're gonna listen to some C3.
by PriscillaHilton November 25, 2008
 
2.
c3
c4 minus one.

What the military uses when they're too cheap to buy c4 explosive

Also known as a plastic explosive
c4 - 1 = c3
by BBoy Preacher November 29, 2008
 
3.
c3
Third generation Corvette (1968 through 1982)
1968 through 1973 (Chrome Bumper Corvette's)
1974 through 1982 (Rubber Bumper Corvette's)
1953 through 1962 = C1 Corvette
1963 through 1967 = C2 Corvette
1968 through 1982 = C3 Corvette
1984 through 1996 = C4 Corvette
1997 through 2004 = C5 Corvette
2005 through ???? = C6 Corvette
by fl_rider October 27, 2006
 
4.
C3
A tiny Penis or a person with a tiny penis. A play on the typed out visual for a penis c===3, but this person has a small, unmanly, shameful penis. Note, no African Americans suffer from C3 except for Lil Wayne, whose penis is in fact Lil Wayne without the Wayne.

C3's often have to resort to Group Sex or extreme sexual positions such as the Dutch Omelette to even partially arouse their partners.
C3, three peat!
by Rob Slapstick June 13, 2011
 
5.
c3
A radio transmission in Counter-Strike, meaning:

Need Backup,

but said in normal life
c3, c3!!! wtf?
by Lorne Richardson July 06, 2003
 
6.
c 3
Hot Feet.
c 3 c 3 d:
by TehCao October 04, 2010
 
7.
C3
Quick term to let yo homies know theres a cutie present so be chill and check yah swagg.

Used as C for cutie and 3 is used and a backwards E to throw off everyone around you so you or friends have an advantage.
You: Eh yo, C3 man!
Friend1: Ah shyt
Friend2: She got friends
You:C3 x 2

Friend1: Then everyone has someone to talk to?
Friend2: We're all set
You: Lets do it, den!
by iGHOSTkid August 09, 2009