The one-word form of the phrase "Son of a bitch", commonly used by rednecks. Also spelled "Sonnuvabitch", "Sunnovabitch" and "Sonnovabitch", all present the same insult. Although mainly used by rednecks, it can be used by anyone, but it would soundweird.
"Hey Tom, that sunnuvabitch just tried to steal gas!"
Now rarely if ever used with actual thought given to the character of a person's mother.
1. asshole, prick, bastard
2. one who misleads or is deceitful : LIAR 3. someone who gets something they don't deserve or more than seems fair, especially relative to the speaker
4. expressing surprise or anger
That's my sister you're talking about, you sonuvabitch.
That sonuvabitch said he'd be here. Where is that asshole?