The most dangerous concotion ever concieved. It is made by mizing a can of Mountain Dew and Red Bull. It causes you to see vapour trails and have an energy siezure. If you survive the crash will knock you out.
Robbie drank a Mountain Bull this morning and at the basketball game he passed out on the court!
by pousson November 11, 2007
mount gay rum and red bull
dude i got so crunk at the Bergh estate off mountain bull.
by Christian12 September 12, 2009

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