Of course, that’s what trump said in the famous recording. Is this common slang wording? I’ve never heard a guy say such a thing. I probably would have said, “like a son of a bitch”.
Perhaps he was admitting that he fucks dogs.
Urban Dictionary:
He’s just using the affectionate nickname that his friend Vladimir “Butch” Putin gave him.
Whatshisname Bush said he didn’t understand the expression in context either.
I’ll guess that Trump is emotionally and culturally isolated: his “friends” are unlikely to challenge his diction nor to speak so slangily in his presence. There’s no reason to think Trump would understand contemporary slang.
It always struck me as the way a man with no friends thinks men talk to their friends.