1 definition by PR Buck

A race taking place on any paved surface with 2 or more cars, where all contestants are to hold their speed at exactly 20 mph and at the end of the third honk accelerate to 120 mph at minimum.

Similar to 30, 35, 40, 50 and 60 rolls, all of such races have the standard of 100mph between start and end speeds.

Obviously the person in front wins if they complete the gap first, they stay out in front until all participants mutually shut cars down or all other participants let off early.
Jon wants to 20 Roll against you in his Camaro, don't worry though it doesn't even hit 100 mph.
by PR Buck February 26, 2016
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