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Definition of piss-up noun from the Oxford Advanced Learner's Dictionary

piss-up

noun
 
/ˈpɪs ʌp/
 
/ˈpɪs ʌp/
(British English, offensive, slang)
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  1. an occasion when a large amount of alcohol is drunk A more polite, informal word for this is booze-up.
trait
noun
 
 
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