Lyric discussion by MikeyG133 

Cover art for Brianstorm lyrics by Arctic Monkeys

I think this song was meant to be very sarcastic. It is kind of saying, "Yeah Brian, you're so cool because you get so many woman with your edgy look."

He references the t shirt and tie as the "cool new look" which represents today's "scene" crowd. The singer is basically saying, "<sarcasm>yeah you're cool, we get it. YOU'RE SOOOOOO ORIGINAL.</sarcasm>"

My Interpretation