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1.
The act of a women eating a butterfinger then blowing a male (boyfriend), then while chocolate and peanutbutter is still slathered on the males cock, he proceeds to violate the woman anally until climax; finally the cum, chocolate, peanut butter and possible a few flakes of shit are sucked in orally by the male.
Me and my girlfriend went Halloweening at John's Party.
by Mike Myers (/V\) October 31, 2011
 
2.
A man and or women in the act of getting kids who go trick or treating to check out their hallow weiner.
Hey john whats that your doing there
Nothing jim just halloweening with the kids
by Tumadre94 October 31, 2009