The inherent fear when you've just taken a big dump and flushed the toilet, that the water is going to spill over the edge of the bowl because you've clogged the toilet.
I had a severe case of overflowbia at my in-laws as I saw toilet water rising towards the rim of the bowl.
by Vegas Stu August 20, 2009
2 more definitions
Fear of flushing a toilet lest it overflow.
He changed stalls in the public bathroom because of a severe case of overflowbia stemming from the huge wad of toilet paper in the first stall he tried.
by pyrodoctor October 30, 2008
Fear of ones bath overflow and spiders that live within
cover the overflow because i have Overflowbia
by Amy uk September 04, 2007