The nickname given to Panic! at the Disco bassist Jon Walker. First letter of first name and first part of his last.
JWALK is so much better than Brent.
An upgrade. Refers to how Panic at the Disco got so much better after they replaced Brent with JWalk.
"Dude, I got some really shitty seats."
"For $10 bucks you can JWalk 'em to front row center."
"Seriously? Shit, JWalk me then!"