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Hi

Is the underlined a natural expression? I heard it on TV the other day. Or did I mishear?

A- They're all coming tonight for dinner.

B- So fun. (sarcastically)

Thanks,

Tom

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Fun is a noun, so standard English is such fun.

But younger people tend to use 'fun' as an adjective. eg That was a fun movie. eg That movie was so fun.

English is an evolving language.

Clive