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Someone who is fixated on butts or hineys at the level of a science.

Someone who is engaged in hineytology or buttology.
She was was an amazing hineytologist and was hired to assist the airline industry with their seating configurations.

His expertise as a hineytologist were legendary and he could accurately describe the feel and scent of every hiney in the animal kingdom.
by Doggie n Jaggie June 09, 2013
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