oh my giddy aunt
Also found in: Acronyms.
oh my giddy aunt
dated A mild exclamation of surprise, alarm, dismay, annoyance, or exasperation. Primarily heard in UK, Ireland. Oh my giddy aunt, what a generous gift! Oh my giddy aunt! Don't scare me like that! A: "Oh my giddy aunt, what manner of rubbish are you watching?" B: "Haven't you seen this before? This is the latest reality TV sensation!"
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