bomb

(noun) an explosive device fused to explode under specific conditions.

(noun) strong sealed vessel for measuring heat of combustion. Synonyms: bomb calorimeter.

(noun) an event that fails badly or is totally ineffectual. Synonyms: turkey, dud. Examples: "The first experiment was a real turkey." "The meeting was a dud as far as new business was concerned."

(verb) throw bombs at or attack with bombs. Synonyms: bombard. Examples: "The americans bombed dresden."

(verb) fail to get a passing grade. Synonyms: fail, flunk, flush it. Examples: "She studied hard but failed nevertheless." "Did i fail the test?."