short for cunt loser, basically a referance to any female who generally tends to grate on your nerves. also a hand sign, formed by making a "c" with the thumb and curved index fingers on the right hand, with a simultaneous "L" made with a perpendicular index finger to extended thumb of the left hand. It is always best to use the gesture with the expression. use with gusto.
My Aunt Jean is a CL, and boy does it show.