A euphemism for smoking crack. Most crack pipes are shaped somewhat like an "L," where the vertical line is the barrel of the pipe and the horizontal line is the bowl where the crack is placed.
Heard in the lyrics of Ride Wit Me by Nelly:
If you wanna go and take a ride wit me
We three-wheelin in the fo' with the gold D's
Oh why do I live this way? (Hey, must be the money!)
If you wanna go and get high wit me
Smoke a L in the back of the Benz-y
Oh why must I feel this way? (Hey, must be the money!)
To smoke a Blunt,aka a cigar filled with marijuana, preferably a Dutch Master :)
Ay, Yo Lets go Smoke a L, Or Grab an L and come over.