Enough, both of you,' Clary said. 'You can't be complete jerks to each other forever, you know.' Technically,' said Simon, 'I can.' Jace made an inelegant noise; after a moment Clary realized that he was trying not to laugh, and only semi-succeeding.
Cassandra Clare (2011). “Cassandra Clare: The Mortal Instrument Series (4 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels”, p.1275, Simon and Schuster