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The act of a woman brushing off crumbs accumulated on her shirt around the topside of her breasts. Usually associated with a full-bosomed woman with a nice upper shelf.

Shelf duster -a woman engaged in said activity.
After eating the crusty French bread, Lizzy tidied up her black t-shirt with a quick bit of shelf dusting.
by Darlinka Kevina November 14, 2010
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