Top Definition
Happy Electronic Prosthetic (HEP) is a small computerized gadget like a cellphone, PDA, wristwatch etc. also known as a "Personal Electronic Thingy". frequently worn, or attached to womens faces while driving.
I used to carry a datebook and a bag phone... now that I have my Happy Electronic Prosthetic, I can keep track of my appointments, text message my GF and play tetris all through class!
by JonnyPhenomenon November 01, 2005

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