Coupler

A coupler is a person, usually male, that is penetrated sexually from both ends. Thus acting as a coupler for the other two partners. This is also referred to as not being "just gay" but "double gay". Which has been scientifically proven to be twice the amount of gayness.

He's such a slut. He's a coupler for both Terry and Julian when they do the sex.

Coupler

When an amputee or one with an injured arm hand pleasures two men at once by having them face each other and strokes across the the two mens' shafts.

Peggy sprained her wrist at volleyball practice and we were trying to pull a train on her but she refused and just gave us the coupler.

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acoustic coupler

1) An old-fashioned telecommunications device that makes digitally-encoded sounds to be received and interpreted through a telephone handset. The acoustic coupler had two rubber cups that fitted the "mouthpiece" and "earpiece of an old-fashioned phone "receiver".

2) A person who makes a lot of noise during sex.

"My phone won't fit the rubber cups on this acoustic coupler"

"Britney had her boyfriend round overnight and I couldn't get to sleep. She's such an acoustic coupler"