n. the upper part of the gluteal cleft (cracksense 1) visible above the beltline of a man, bent over at work. I came into the kitchen and was greeted by a plumber's smile owned by some guy working under the sink. : She referred to the overexposure of his rear end over his belt as the “working man's smile.”
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
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