The definition for this word is in fact, very simple. R-E-T-A-R-D-E-D. It is used by posers worldwide, people who worship Bam and are pushed to make an ollie on grass. I believe Avril Lavinge started this stereotype, and also the belief that she was "skater" music. Skater music is as varied as anything, and there is no real "skate music". If there was, skaters would all listen to a few bands, but that is not so. However, there are upcomings to the word "sk8". When someone uses it, unless you have seen them skate, you can almost immediatly distinguish that they suck cock at skateboarding.
Poser slang, that they use to describe anything to do with skateboarding. This is a really stupid term and should never be used, but it has its highlights..........if someone uses it you can tell that they suck at skateboarding before you even see them skate.
Poser#1: Hey man, lets go sk8
Poser#2: Right on, i just waxed my Griptape for darkslides.
Poser#1: I can do those, but only when nobody is watching me.
Poser#2: Me too, Sk8 or Die.