tinhorn adjective 1noun 1forms 3 adjective1 •(US) Cheap, inferior; pretentious. noun1 •(US) A contemptible or pretentious person, especially one who gambles for low stakes.I'm to deliver this treaty, signed by Secretary General Tanduk Timah himself. Heh. 'Tanduk Timah' in Bahasa Malay means 'Tin Horn.' How apt. — 2009 formstinhorns · more tinhorn · most tinhorn