A euphemism used typically on the internet at the time when a person is abusing caps. The term comes from the movie Anchorman when the characters in the movie are arguing loudly and the character Brick suddenly screams LOUD NOISES at random.
Noob: OMG WTF DON'T YOU DO ANYTHING RIGHT? ALL YOU DO IS PISS PEOPLE OFF AND MAKE ME MAD OMG GTFO.
Troll: LOUD NOISES.