A small, dirty piece of male white trash, usually with an under-developed peachfuzz moustache, greasy longish hair (preferably a mullet), and a faded heavy-metal concert t-shirt. Usually the guy you go to last to buy a sack.
I don't go to monster truck rallies. Too many doobags.
short for the infamous insult 'doushe bag', this quipt will earn a laugh, whether used as an adjective OR a noun.
'Allen, ur such a doobag!'