Top Definition
can be done in two ways:

1)drink a gallon of milk quickly and try and hold it down for an hour or more.

2)requires 2 or more people, drink a gallon of milk quickly at the same rate. last one to throw up wins.
whats wrong with him?

he got his ass kicked at the dairy challenge.

-or-

whos down for dairy challenge?
by Sir Joseph Price April 09, 2007

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