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2.
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
 
1.
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 09, 2012
 
3.
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