slummock

 
Pronunciation: /ˈslʌmək/
British informal

noun

  • a dirty, untidy, or slovenly person: ‘you lazy little slummock, you’ shouted Mam

verb

[no object]
  • behave in a lazy, indolent, or clumsy way: you’ve slummocked in bed for weeks

Origin:

mid 19th century: of unknown origin