Dick-sucking lips. Describes full, soft, larger-than-strictly-necessary lips that one can assume would be best suited to sucking dick.
Anon: Guys, can you help me with this drawing? He looks way too feminine for some reason. :/
Critic: He's got DSL, bro.
by Skullllllll April 20, 2010
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Dick Sucking Lips; A fine, plump pair of tasty lips that are best used for performing fellatio.
Dude 1: "Man, my girlfriend has some awesome DSL! I have her down on it constantly!"

Dude 2: "The internets?"

Dude 1: "No, you silly bitch! Dick sucking lips!"
by ikarimaru August 05, 2008
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Wow, that chick has nice plump lips, those are totally DSL!
by Jay2324 February 07, 2009
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