Answer:

SLOB

AnswerCrossword Clue
SLOBCleanliness eschewer
SLOBLout
SLOBOscar Madison, e.g.
SLOBOscar Madison-type
SLOBPiggy person
SLOBMadison, for one
SLOBMess maker
SLOBMessy one
SLOBSlovenly one
SLOBDinner's often on him
SLOBMessy person
SLOBNo neatnik
SLOBNeatnik's antithesis
SLOBUnkempt one
SLOBNeatnik's nemesis
SLOBNo fashion plate
SLOBOne who's slow to pick up?
SLOBOscar Madison, for one
SLOBNeatnik's opposite
SLOBOne who doesn't pick up?
SLOBDisorganized sort
SLOBMessy type
SLOBOne who doesn't make arrangements?
SLOBPig
SLOBHis stuff is all over the place
SLOBNeatnik's bane
SLOBOne who leaves too many things out
SLOBOne who often has trouble finding things
SLOBHardly an orderly type
SLOBMaid's challenge
SLOBDisorderly type
SLOBDisorderly sort
SLOBSchulz's Pig-Pen, e.g.
SLOBSty resident?
SLOBPig at the table
SLOBUntidy type
SLOBOne who often doesn't pick up?
SLOBBachelor, stereotypically
SLOBOne who lives in a pigsty?
SLOBGrubby guy