Onamatopeioa of the sound a step-on switch makes in Sonic The Hedgehog for Sega Genesis. Consists of a 3507 hertz square wave for 35 thousandths of a second. Sound Test on Sonic 1 is number "CD". A silly noise to make when you switch on a large/powerful appliance (microwave ovens actually make a similar, though not identical, sound) or flush a toilet.
The Plugger made a 'keeep' sound as he flushed his mammoth deuce down the can.
by Wm. Wallace The Freedom Fighter November 04, 2007