Noun
The son of unmarried parents, an illegitimate child, a bastard.
(Can we add an example for this sense?)
(derogatory, slang) An objectionable person.
Used other than figuratively or idiomatically: see son, whore. (the son of a prostitute)
Source: en.wiktionary.orgAs you know, I'm fighting with ambassador (John Kerry). His gay ambassador (Philip Goldberg), the son of a whore. He pissed me off. Rodrigo Duterte
On US Ambassador Philip Goldberg: We were speaking to Kerry, he's OK but I had a fight with their ambassador, that gay son of a whore. He pissed me off. He was meddling in the elections, giving statements here and there. He wasn't supposed to do that. Rodrigo Duterte
At borrowing cousin german, at repaying son of a whore. French Proverb