Top Definition
The relations between a man and a women, in which sex is the only aspect of it...there are no strings attached and this type of harmony is useful when the girl is significantly younger however still legal...this way the women cant get mad at the guy and she cant have expectations of it going any farther than the bedroom...or wherever the sex may occur...

This is most commonly seen in college
hey are you guys in a relationship yet?

No buddy...we've just decided to have a sexonlyship.
by Starksy October 21, 2007
6 Words related to sexonlyship

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