Top Definition
An alcoholic activity where the consumer drinks 3 shots of whiskey followed by a pint of guiness or an irish carbomb.

Can be considered a more extreme version of the irish carbomb.
Last night I got ridiculously wasted, I pre-gamed at Amanda's before hitting the bars and then did an irish tour bus at midnight...then I stole 10 traffic cones.
by danrew July 11, 2009
5 Words related to Irish tour bus

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