Like tromboning, but for girls. Said so because in order to give a girl hand fun from behind you have to move your hands like you're playing a castanet.
guy 1: has your girl tromboned you yet?
guy 2: naw, but i totally castanetted her last night.
by triggerwords February 9, 2012
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Hand held device used in flamenco dancing to make a tapping sound.
Flamenco dancers use their castanets to tap along with the music.
by controltouchmaster February 27, 2010
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The female gentialia. Frequently found in conjunction with "tuna".
She had a great pair of tuna castanets.

Samantha was a keen player of the tuna castanets.
by Indie Punk July 27, 2003
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Sagging vaginal lips. See also Beef Curtain.
She sure knows how to play the spam castanets.
by donkey April 15, 2004
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A Percussion instrument, of Spanish origin, comprised of specially prepared assorted meat slices worn between the thumb and four fingers.

They are mainly used in flamenco dancing and emit little to no sound when played.
Hey, I'll play the guitar, Pedro can play some Spam Castanets
by Gene! October 3, 2007
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London based word describing the labia or 'poon lippage'. Esp. of the dangly variety.
Geez 1: Whats her cootch saying the?
Geez 2: Boy, all good, but what a pair of Spam Castanets!
by Ruthless 1 April 19, 2005
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