Generally a derogatory slur used to refer to young white males that try to act ghetto, but aren't really down, especially preppies that turn wigger after a couple of drinks. Common West Coast (esp. San Francisco) street and law-enforcement slang.
English: "They're acting tough, but they're just a bunch of CAWBs."
Ebonic: "That whitebread CAWB bes jus step up out mah face 'fo he get tossed."
Cawblenn or Cawlenn or Gawblima, is A regularly used Bajan expression in Barbados usually used in the context when one is surprised or shocked like (wow) or used as just an expression sometimes.
Rico: "You saw the video when Shamar got beat up by all them men?"
Antoine: Cawblenn! It was a lot of men for real
Friend 1: "hurry let's run, The bus is right there up-top the hill"
Friend 2: "well cawblenn I ain't running just for it to drive along and leave me as soon as I get up there"