A more civilised way of saying Friends with Benefits. Typically used by people who are not native English speakers as a way to find a fuck buddy. Rarely used in every day conversation, Indecent Friends is the more polite form of asking a friend to have casual sex with you.
So... How about you and I enjoy some time as indecent friends...

Girl: "Are you interested in being Indecent Friends?"
Guy:"Hell yeah! Grab a Coffee and then back to mine?"
by CBarclayA December 31, 2018
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