An extra fancy outhouse found in rural and backwoods areas that have two buckets of corncobs to wipe your ass with. One uses a red corncob on the initial wipe.Then one uses a white corncob to see if they need another red corncob.
Possibly the worst invention in history. The double decker outhouse is, quite literally, two toilet stalls stacked. Although this structure conserves space, it is completely impractical and downright messy.
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.