The poor guy behind the bar, usually a hapless college student trying to 'break into the business', who works for pennies yet does all the hard work in the bar such as refilling kegs, restocking the ice chests, kicking obnoxious drunkards asses, etc, while the hot, big boobed 'bartenders' flirt with the customers and take all the tips.
Hey bar bitch, the Bud Light's empty again!
the girls that are always sleeping around with the bartenders and bouncers at Tucks
Crater face is such a bar bitch!
the person who always ends up getting the rounds in
'get me my drink, bar bitch'