A burning question

What is the correct plural form of "son of a bitch?"

I think I usually pluralize both "sons" and "bitches":

"Those fuckin' sons of bitches."

Often, you'll hear guys say "son of a bitches." That just sounds stupid. If you want to retain the singular "son," at least twang it out and go for the golden "summbitches."

"Those fuckin' son of a bitches."

"Those fuckin' summbitches."

The latter is way better, obviously.

So "summbitches" sounds the best, but the question still remains: what's the correct form?