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1.
Receiving a blowjob in which the giver uses so much teeth, it's as if they are attempting to dredge the flesh from the penis, similar to a dredge scraping the bottom of a waterway to make it deeper.
"Dude when she went down on me it felt more like a dredge job than a blow job."

"That dredge job left my penis feeling like I made love to Edward Scissorhands, or a food processor."
by LetsStartARiot January 01, 2014