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2.
Generic, gender-neutral catch-all term for anything pertaining to external organs or orifices that perform reproductive and/or gastrointestinal functions.
His/Her corpulent bulbtocks rippled mightily with every stenching jet of oily, sticky fluid expressed.

Note: Usage should be vague and both orifice and gender neutral.
by FecesBoy May 22, 2004
 
1.
"Bulbtocks" can also be used as an identifier to label excretory body parts (See primary definition) that have exceeded their normal operating parameters to such a degree that possible health hazards may result.
If doing an after-crap cleanup involves 4 packages of kitty-litter, a bottle of bleach, a wire brush, and a call to a wallpaper contractor, then you may then refer to your ass as a "Bulbtock". God help you and your bathroom...
by Fecesboy August 23, 2004