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One who labors in the cellar (or barrel room) of a winery never seeing the light of day. Quite like a rat.
Dude 1: What you doin' for the summer?
Dude 2: Ah, I'm a cellar rat at Eola Hills Wine Cellars.
Dude 1: Sick! That place has the best Sunday Brunch in Oregon!
by huggs September 01, 2009