What is "godsdamn"

a. (context neologism vulgar offensive English) damn by gods; (non-gloss definition: used as an intensifier). alt. (context neologism vulgar slang English) (non-gloss definition: An expression of anger, surprise, or frustration.) interj. (context neologism vulgar slang English) (non-gloss definition: An expression of anger, surprise, or frustration.)