swear word

noun2

1. •
   A word considered obscene and vulgar or offensive.

   • When I heard swear words from the next room, I decided to keep my distance.
   • Your kid said nasty swear words to me this morning.
2. •
   A word that escapes someone's mind (and therefore often also their mouth) in a nearly automatic way when the person is under duress, mental stress or distress, etc; such words are often obscene and vulgar or offensive.