Top definition
A combination of redbull and vodka usually consumed in bars, nightclubs and other dancing establishments. Causes otherwise normal people to become unduly aggressive, leading to fights over women, fights over cars and fights over who has to buy the next drink. Consumption of meathead tonic has also been known to lead to lost shoes, tossed bricks, high speed car crashes, and inexplicable wounds the next morning.
John drank 10 meathead tonics, now he's kicking the headlamps out of that Mercedes.
by kxmoney July 27, 2006
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