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The act of unleashing uncontrollable bursts of laughter privately, (or publicly) to the point of hysteria or hyperventilation. A laugh is unique and entrusted to everyone, but a roister roll is for the gifted few blessed with overachieving glee!
Oh man....while eating at the cafe the other day, Brittany unleashed her roister roll.

Haha...was everyone in the place staring at you?

Are you kidding, of course, it had it's own echo.
by lennonutt March 11, 2011
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