What is Damn ?
Damn is (noun) I don’t give a damn used to say emphatically that you do not care at all (informal.) (verb) 1. used to show annoyance Damn it, we’re going to be late. Damn him, he’s left the front door open! 2. to severely criticise someone or something The new film was damned by the Sunday papers. 3. to condemn someone or something in a religious situation Galileo was damned by the Church for saying that the Earth turned round the Sun. (interj) used as a mild swear word to show annoyance Damn! I’ve left my umbrella on the train.
source: Easier English, Student Dictionary Upper Intermediate Level