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As in "crazy as a..." Indicates a persons mental health...or rather the complete and total lack thereof. Like shithouse rat, only more pc for use in mixed or questionable company wherein one might become offended.
Person 1: What did you do that for?
Person 2: Don't mind me, I'm just crazy as an outhouse rat.
by ElKrampo7 May 15, 2006

Words related to outhouse rat

crazy insane loco loko mental nutjob nuts shithouse rat