be breaking a butterfly on a wheel
To be applying an excessive amount of force to achieve something minor, unimportant, or insignificant. The phrase appears in the rhetorical question, "Who breaks a butterfly upon a wheel?" The line is a quotation from Alexander Pope's poem "Epistle to Dr Arbuthnot." To "break upon a wheel" refers to a form of torture in which the victim has their bones broken while strapped to a large wheel. Primarily heard in UK. The government's use of drone strikes and artillery bombing on the town to wipe out a tiny faction of rebels is totally unjustifiable—they're breaking a butterfly upon a wheel. These contractors are always breaking a butterfly on a wheel. Like, hey, it's not OK to destroy the whole house just to upgrade the electrical wiring! That rogue military group is breaking a butterfly on a wheel by blowing up civilian areas.
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