http://thesaurus.reference.com/browse/obnoxious
A sod.
The correct spelling is "obnoxious" referring to behavior, meaning unpleasant, boorish, or irritating.
It means that you are annoying
Obnoxious
A slob is a person who is messy, untidy, or careless in their personal habits or appearance.
obsessive obnoxious outstanding optimistic
"Sod" can refer to a section of grass-covered soil held together by matted roots, used for landscaping. It can also be a slang term for a person, often used to express annoyance or contempt.
burt ward. he was a very obnoxious person and an unpleasant drunk.
A "know-all" or in US a "know-it-all"
That boy is so obnoxious.
The loud and obnoxious music from the party next door kept me awake all night.