idiosinkrasy
A unique character-trait dat relates to either da wash/drain-pan in yer kitchen/bathroom, or something's not floating.
Due to my buddy's idiosinkrasy, he forgot to check da hull-seams on our rowboat before setting said small craft in da water, and so he didn't notice dat da caulking was in urgent need to touching up; we hadda delay our fishing-trip for a few days to make repairs after said leaky punt caused us both to embarrassingly end up in da drink before we'd even gotten ten feet from da dock!