A woman who maks highly questionable noises during sex, such that it sounds as if you are just pressing the sound effect buttons on a keyboard rather than pleasuring her.
*ooh-ooh-aah-aah*
*woof woof*
*ding dong*
*squelch*
*mmmmooooooo*
*beep-beep*
*dropped cutlery*
*police siren*
*tearing paper*
*helicopter*
*meow*
*baby laugh*
etc.

Dude 1: Do you think she's faking?

Dude 2: Nah, she's just a sex keyboard
by Mr. Cardboard November 8, 2011
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Means the same as cybersex, which is pretending to have sex by typing messages in a chat room or chat program.
Keyboard sex is pretty lame if you think about it for more than ten minutes.
by Adel7 August 13, 2007
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