shucks
From Longman Dictionary of Contemporary Englishshucksshucks /ʃʌks/ interjection American English old-fashioned DISAPPOINTEDused to show you are a little disappointed about somethingExamples from the Corpusshucks• Well, shucks, why pay for one when you can just borrow mine?Origin shucks (1800-1900) shuck “something worthless” ((19-20 centuries)), from shuck “outer covering of a vegetable” ((17-21 centuries)), of unknown origin