A relationship based solely on mutual stimulation of the genital regions.
"I had to end our stimulationship, she rubbed me the wrong way."

Friend 1"Bob and Betty dont really seem to be into each other, are they dating? whats the deal?" Friend 2"they are in a stimulationship"

Friend 1 "Oh that makes sense, they just like banging each other"

Stimulationships are good if all you can stand about each other is the sex
by isthisevenreal January 2, 2015
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