Short for "bridge and tunnelers." People who hang out in Manhattan but live elsewhere and come in on a bridge or tunnel. Generally have a trashy reputation among Manhattanites, but in reality can range from sketchy Jersey shore guido types to normal Brooklyn/Queens residents who didn't want to shell out $2000 a month for a closet-sized shithole in The Village. Surprisingly, most B&Ters are nothing like the guy in "My New Haircut." Still snobbier Manhattan residents usually stay away from bars/clubs frequented by the B&Ters.
Jersey shore guido: "Out of the way, broski. Me and my boys are ready to down some fuckin' Jager bombs. We're gonna get wasted and grind on every piece of pussy in this place. The bitches are gonna love my new haircut."
Roxbury bouncer: "This is the Roxbury. We wouldn't allow trashy B&Ters like you guys in this club even if you had Jessica Alba with you."
Jersey shore guido: "Not now chief, I'm in the fucking ZONE!" (tries to walk in, ends up in nearby dumpster)