who am I, are you, etc. to do something?
Who is (one) to (do something)?
What right or authority does one have to do something. I pay my rent and my share of the bills—who is he to judge how I spend my money otherwise? It didn't make sense to me, but then who am I to question the court's decision?
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who am ˈI, are ˈyou, etc. to do something?used when you think somebody has no right or authority to do something: Who are you to tell me I can’t leave my bicycle here? It’s not your house. ♢ I don’t agree, but then who am I to say what she should do?
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