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Word used to describe something that is bad, crappy or just generally low-quality. The estute reader will notice that it is just a French-ed up version of "ghetto" used to make something sub-par sound better than it actually is.
Yeah, our apartment may be really ghetteau, but we love it anyway.
by OSU Kyle December 10, 2005
Angel delight and smarties
A ghetteau, a ghetto gateau
by ssff1987 December 24, 2009