North American an obese person:I could work out four hours a day and still end up a blimp
2 (also Colonel Blimp)British a pompous, reactionary type of person:no Colonel Blimp could have been more nationalistic
3a soundproof cover for a movie camera.
World War I(sense 1): of uncertain origin. sense 2 derives from the character invented by cartoonist David Low (1891–1963), used in anti-German or antigovernment drawings before and during World War II