noun: (rhymes with symphony) Sexual noises made by a woman, screaming, moaning, dirty talk, bed shaking, etc. purely for theatrical effect rather than actual sexual response. A woman puts on a nymphony when she wants to draw attention to the fact that she's a super hot fuck, a nympho, or generally has something else to prove.
Deb: "Ron's coming over tonight. We'll probably end up doing it. Should I throw down a nymphony on him or play it cool?"
Beth: "That's a tough one. You don't want him to think you're some kind of whore or something. I say, start off all sweet and innocent, and they break out the nymphony, like he's just so goddamn good you can't help it. That'll drive him wild."
Andrea: "Oh God, slam me harder, you sexy fuck! I wanna feel it for a fucking week! AH YEAH! FUCK ME!"
Paul: "Dammit! Tone down the nymphony, girl. Your mother's right downstairs!"
Andrea: "My mother did the exact same thing to me last night with her new BF. I'm just getting her back."
Jack: "My roommate had that hot slut of girlfriend over again last night. They were at it until 4 a.m., just slamming the bed against the bedroom wall and she was screaming like a porn star."
Ben: "I still say it's just a nymphony. That chick has the hots for you big time. She's just letting you know what she has to offer."