The idiom "amateur hour" is used to describe a situation where someone is doing something very poorly or unprofessionally. It is often used to criticize someone who is not doing a good job or who is not taking their work seriously.
For example, if a professional athlete is playing very poorly, someone might say, "This is amateur hour! They're playing like they've never played before!" Or, if a cook is making a dish very poorly, someone might say, "This is amateur hour in the kitchen! They don't know what they're doing!"
In general, "amateur hour" is used to describe situations where someone is not performing up to the expected standard. It can be used in a variety of contexts, including sports, work, and everyday life.
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