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shit disturber

British  

noun

  1. informal  a person who enjoys causing controversy or upsetting people

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Although considered vulgar, this phrase is nonetheless commonly used and is generally not thought offensive enough to be considered taboo