Maybe I'm an egocentric old so-and-so, but I feel useful here.
"You're a slippery old so-and-so, you know," he said in a voice that was a mixture of reproach and grudging admiration.
Wonder if old so-and-so will turn up?
Thomas was a tight old so-and-so, but even he would let it die now.
Still, now the mean old so-and-so is dead, things should be a lot better for us.
So tell me what the old so-and-so did this time.
He's a flinty hearted old so-and-so in spite of his smiles.
"Hey, you old so-and-so, why didn't you say something!"
You'd have gone off to tackle that dirty old so-and-so without me.
You've listened to me going on about the mean old so-and-so on countless occasions.