l8

l8 = late and the r is invisible. serves the same purpose as later would.

person 1: i gtg ttyl
person 2: l8

l8

l8 as in get your shit wrecked or get owned. Common word at miramonte high school.

Jake: I got my ass kicked yesterday by a girl...

Justin: l8 dude...

l8

L8 is actaully means Late

"Its late nite,go home, eh m8?"

l8s

Prounced "lates." A much cooler version of l8r. The evolutionary nature of this phrase is further reinforced by the fact that the "s" follows the "r" alphabetically.

hapy: l8s, yo! catch you on the flipside!
country rube: wtf is l8s?
hapy: die in a fire, go look it up on urbandictionary, bitches!

l8 b8

Short for "late, bate," which is short for "later, 'bater," which is of course for "see you later, you prolific masturbater."

Gotta go. L8, b8.

ur m8 is l8

Ur m8 is l8 means what it says. It's when your mate IS late!

Guy 1: Hey man, ur m8 is l8!
Guy 2: When will my m8 be here?

L8 D8

L8 D8 is a "Late Date". Specifically, L8 is an acronym for "Late" (i.e., L-eight) and D8 stands for "Date" (i.e., D-eight)

Hey, I really need to leave early tonight - Cuz I have a L8 D8.