"Cheer!"

[Abc123]

Hi,

Please have a look at this situation:

A: I just failed my exam
B: really? Cheer!

Can B's statement be understood as a consolation (asking A to cheer up) or a joke (he himself cheered up when knowing the news) or both meanings?

Thank you very much.
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Please help correct my mistakes whenever you see them. Many thanks :)

[Beeesneees]

Neither, as it stands.
'Cheer! used on its own is a command to say something like 'hooray'.
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Cheers m' dears!

[Abc123]

You mean 'cheer' is not something people say but a command to say, i.e. the speaker says 'cheer' and the listener is expected to say something like 'hooray'?
_________________
Please help correct my mistakes whenever you see them. Many thanks :)

[Beeesneees]

If it is used alone, yes.

'Cheers' (used alone) is a greeting or expression of good wishes, though.
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Cheers m' dears!