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A game played usually between two people in which one participant shouts "mandatory jello!" and collapses like said gelatinous substance towards the ground and towards the second partaker. The second person is required, per the rules of the game, to attempt to catch the fall-ee from falling. It has been suggested that this game is equivalent to a small scale trust fall (however much more fun and less therapuetic).
*standing around talking*
"mandatory jello"
by ress_anne April 07, 2011