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15.
n. A relationship based entirely upon sex; it has no real emotional value whatsoever.
Nathan and Patti have such a fellationship. They never go anywhere, all they ever do is stay home and screw.
by Philip A. Latio July 15, 2008
 
16.
a term used to describe the brown-noser / brown-nosed relationship.

(may also be used to describe a sexual relationship based solely on fellatio)
The new assistant editor could totally destroy Eric's fellationship with Michael.
by Mikhail_Bergsworth April 19, 2006