Used as slang to mean that you gave someone chlamydia or to explain that you have chlamydia. It is usually associated with an nsa hookup whereby the person that is 'clapped up' didn't realise the person they slept with had chlamydia.
I was clapped up in the supermarket carpark by Jeffrey. I didn't realise...
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Used as a coverup for someone shouting allahu akbar .
POLICE: What did you just say?
Radical: Oh, nothing, I was just talking about the new restaurant in town... It's called Alan's Snackbar!
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