Definition of slattern noun from the Oxford Advanced Learner's Dictionary

 

slattern

 noun
noun
BrE BrE//ˈslætən//
 
; NAmE NAmE//ˈslætərn//
 
(old-fashioned)
 
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a dirty untidy woman Word Origin mid 17th cent.: related to slattering ‘slovenly’, from dialect slatter ‘to spill, slop’, frequentative of slat ‘strike’, of unknown origin.
See the Oxford Advanced American Dictionary entry: slattern