Top Definition
csl
cock sucking lips. a handy abbreviation which is specially useful when describing someone within cuffing distance who you don't want to know what you are talking about
look at the csl's on that!
by Anonymous May 22, 2003
csl
cant stop laughing

new IM phrase that actually is a new 'lol' seen as that is overused....
erick: are you gay?
mike: yer
erick: haha csl
by craig and rachel November 23, 2006
CSL
1. a physical characteristic of a person indicating prompt, attentive and mind-blowing oral-clitoral stimulation.

2. clit sucking lips.
That kid has some mad CSLs.
by fourcarats July 25, 2010
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