sidewalk surfing
Riding a skateboard, designed as a means of transportation



Example:

This guy: Those pigs are always fuckin' with me just 'cause I board.

That guy: Dude, happens to me all the time

This guy: What bitches. It makes me want to put a 187 on those doughnut munchers

That guy: Chill out bro, let's do a bit of sidewalk surfing. We can fuck with 'em while we're at it