Learn useful ways to say "who knew running" in English with drama examples and natural alternatives.

It means the speaker is expressing surprise and frustration that the job is much harder than expected.
From I Think My Wife Wants To Kill Me S2, Episode 32
Someone complains about how difficult their job is.
Use this when talking about a difficult task or job in a casual, frustrated way. It fits spoken English, but the full line is a bit specific for a reusable phrase page.
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