Goddammit is a sharp word people fire out when something goes wrong and they are angry, fed up, or in pain. You say it on its own, like a bang: a dropped phone, a missed bus, a file that will not open. It is not a careful sentence. It is a curse. Though actually, inside it you can still hear a prayer gone bad: it squeezes together “God damn it” — once a wish that God would punish this thing or this moment. Most speakers today are not thinking about God at all; they just want a heavy, ugly sound for “I’m so annoyed.” Some Christian people find it offensive, because it uses God’s name in anger, and in many churches that is a serious thing. It is informal and rude. You might hear it in films, in traffic, among friends who swear. You would not write it in school work, and you would not say it to a teacher, a grandparent, or in church.