Or 'Crablin', a.k.a. a certain London-based individual known to be both loud and drunk. Chances are that if you've been to a London indie-rock show, he's shouted in your ear. Such behavior has spawned a slew of copycats, each 'Crablining' their way through gigs all over town.
"Hey you, quit Crablining," is something an offended gent may say.
"LOL LOL ROFL HARRIS LOL TWEED!" being something the offending Crablin might dribble in response.