keeep

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.

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