Top Definition
the act of rejecting anyone who rates 8 or lower on the 1-10 scale (8 or lower being referred to as "b-team"). Pulling a true Hasler means going home alone no matter how seductive the subject and no matter how long the dry spell.

For a guy, pulling a Hasler often causes his bros to question his manhood.
Girl: Would you like to come over to my beach house tonight? It's meant to be an all girls pool party but for you I can make an exception
Guy: Nah, I'm tired. I think I will just call it an early night

Guy's bro #1: Did he just go Hasler on her?
Guy's bro #2: He must be either gay or taking playing hard to get to a whole new level!

Girl: Why must all good guys be gay?
by Dr. Brovius Hawthorne January 12, 2014
an extreme partier who drinks crazily exesive amounts of straight or premixed alcohol. in the old days would party all night but these days ends up crashing early
when at a party or out drinking with friends if some one crahes early and falls asleep they've just pulled a "Hasler"
by mad dog tanen October 12, 2008

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