Source : Webster's Revised Unabridged Dictionary (1913)

Slatternly \Slat"tern*ly\, a.
   Resembling a slattern; sluttish; negligent; dirty. -- adv. In
   a slatternly manner.

Source : WordNet®

slatternly
     adj : used especially of women [syn: {blowsy}, {blowzy}, {sluttish}]