n. anything at all. (Usually in the negative. Usually objectionable.) : I don't give a diddly-shit what you do!
mod. virtually worthless; useless. (Usually objectionable.) : I'm gonna take this diddly-shit watch back to the store and get my money back.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.