Top Definition
An oversized metallic 'e-cigarette' type vaporizer nearing the length or girth of a robotic male penis. The user can typically be seen fellating this device enthusiastically in pursuit of his or her high-tech nicotine fix.
Did you see Robert's new E-Cig? Yeah, it's a total robot dong.

Dude, is that a real-life e-peen? Nah bro, it's just my new robot dong.
by RDongSucker January 16, 2014

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