Of all people, things, etc.
Definition 1 of 1

Surprise and Expectation
Emphasizes an unexpected action from someone assumed to behave differently.

John, of all people, volunteered to clean up the park.
Irony and Sarcasm
Can be used ironically, when a person acts exactly as expected but pretends it's surprising.

He, of all people, forgot my birthday again!
Emotional Weight
Adds emotional intensity to the statement, often highlighting disappointment or betrayal.

I can't believe she, of all people, lied to me.
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