Surfing on a funny image-based website for a long time without any facial expression - sometimes interrupted by slightly smiling or gasping.
Mostly done whenever you actually have lots of things to be done.
-Dude, are you again sittin' all night in front of this 9gag-website?
-Yeah.. I've an assignment due tomorrow.
-Great bro, scroll 'n' lol!
-What are you doing?
-Nothing, just scroll 'n' lol.