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Your bread and butter is work that is your main, or regular, source of earnings.
Example of use:
Carol does some freelance web design work, but teaching is her bread and butter.
Image by jasonlam
Idiom: bread and butter
January 26, 2010 By Leave a Comment
About Angela BoothroydAngela Boothroyd is an English language teacher providing face-to-face and online English lessons for speakers of other languages. She can be also found on Twitter @StudyingOnline, Facebook and the Studying Online website
