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When a man gets a blowjob while he gets a haircut. The bib must be draped over the girls head, then when your are finished, you let the hair on the bib cascade down on to the girl, thus creating an avalanche effect.
"After I got my fade in the barbershop, we pulled a Dry Avalanche on this girl, it was hella degrading."
by C-monsta May 23, 2007
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