give a rat's arse

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give a rat's arse

rude slang To care. Typically used in the negative as a dismissive phrase showing one's annoyance or lack of interest. Primarily heard in UK. I don't give a rat's arse about how late your friends are allowed to stay out—you need to be home by 10 PM. I used to care about what those fools say, but I just don't give a rat's arse anymore!
See also: arse, give