What does 'Up your viva' actually mean?

Question

I was wondering what it actually meant because my friends are saying it ALL the time. Litrelly, somebody got told off in R.E in school. they were passing notes, and then miss grabbed it, and showed it to the whole class and it said 'UP YOUR VIVA'! :)

Answer 1

Best Answer - Chosen by Voters

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Answer 2

It's just a rude, crude phrase one of your classmates came up with.