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The phenomenon whereby the force of a bite displaces the fillings of a sandwich or burger away from the eater, possibly resulting in fillings leaking disappointingly onto the plate. Also a verb.
The sandwich enthusiasts were so frustrated by chompush they took to eating sandwiches that had been glued together with an edible adhesive.

The Earl of Sandwich had no time for chompush, thank-you-very-much, so wouldn't tolerate his invention having any more than two fillings.

Phyllis attacked her burger with such vigour that she accidentally chompushed a slippery pickle into Albert's face.
by Weirdsworth July 21, 2015
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