slob
UK[slɒb]US[slɑːb]
n
A person who is lazy, untidy, and often dirty.
Etymology
The word 'slob' entered English in the late 18th century from Irish Gaelic 'slaba', meaning 'mud' or 'ooze'. This origin directly informs its modern meaning; just as mud is wet, soft, and messy, a 'slob' is a person perceived as soft, messy, and lacking in vigor or neatness. The term evolved from describing the substance to describing a person who is metaphorically mired in laziness and untidiness, capturing the sense of someone who is content to be in a state of physical and habitual disarray.
Analysis
The word 'slob' is a simplex word of Irish origin. It is not productively formed from separable morphemes in English.
Examples
He's such a slob; his apartment is always filled with dirty dishes and laundry.
Don't be a slob—clean up after yourself in the kitchen.
The movie character was a lovable slob who eventually learned to take responsibility.