break one's balls to do sth
bust (one's) ass (to do sth) definition
and break (one's) balls (to do sth); bust (one's) butt (to do sth); bust (one's) nuts (to do sth)
to work very hard to do something; to work very hard at something. (Usually objectionable.) : You get down there and bust your ass to get the job done right! You hear me? , I busted my butt to please her, and what do I get?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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