M&Ms mixed about twenty-to-one with Skittles.

Standard joke food at science fiction conventions; see also spoo, flarn, and crottled greeps. There you are, placidly mowing your way through a double fistful of delicate chocolate yumminess and debating the merits of pre- versus post-Krikfaluski Ren and Stimpy when all of a sudden something in your mouth goes crunch and it feels for an instant like you've lost a crown and then bitten down on it.