look up any word, like cunt:
 
4.
A new type of pantie that is incredibly revealing and amazingly sexy well still being practical. It has no straps so no tan lines or anything like that. Its replacing to G string
Look at Rachel in that C String that's the sexiest thing iv ever seen!
by Canada_Bound April 23, 2008
 
1.
Kind of like a g-string only more revealing. Piece of women's underwear that consists of a C shaped (hence the name) semi-flexible band that is very narrow at one end and slightly wider at the other end (somewhat like an unbalance hair band). The C-String essentially clamps onto the woman's body with the wide end covering the pubic region (just barely and only if she's is very well groomed) and the narrow end extending up the crack of the ass. The C-string completely eliminates panty lines and if used sunbathing removes 99% of tan lines. It also eliminates a woman's confidence that her underwear will actually stay on all day long.
Carrie wore her C-string with her dress that laced up the side and she was quite a sensation, since she appeared to be going commando. She was an even bigger sensation when she dropped the C-string on the dance floor and had to explain to her date what it was.
by Wagnagger October 19, 2007
 
2.
basically a piece of firm material which you wedge between your arse cheeks and it covers up your bits.

supposedly practical for the reduction of tan lines and VPL. falls out when you do any real activity.
a: what underwear do you have on?
b: this new C string, I've got no VPL!
a: yeah, but it makes you walk like a twat.
by deathdrop April 27, 2008
 
3.
When cum is sprayed on the "tramp stamp" area in a line across the back after doggie style sex. It's essentially a G string made out of Cum.
"I left a C string all on her like you've never seen!"
by Wholesome Nefarious Housewife September 09, 2011