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1.
A trashy person. A person with no manners and no respect for themselves or how they are appearing and acting to others and themselves in public.
Lindsay Lohan is such a blowser stumbling out of a bar, swearing and yelling, without a bra on, and with a cigarette hanging out of her mouth.
by ATMD April 20, 2009
 
2.
female bowser (ie mario baddie)
blowser is such a hard boss
by simonzephyt December 11, 2007