butt fuckin son of a bitch
An insult, a derogitory remark usually slung in the face of the kind of trailer park trash the world would be better off without (more often used with a southern accent). It describes the actions of a male of questionable decent(possibly having been born from the womb of a female dog), having anal sex with a chosen partner(probaly a cousin)..
"Cleatus! you butt fuckin son of a bitch , get off you dang cousin!!!!"