cowson adjective 1noun 1forms 1 adjective1 •(slang, no longer used) Used for emphasis; bloody; fucking.That cowson nut is rusted frozen.That cowson car refused to start on the tenth attempt. noun1 •(slang, no longer used) An objectionable, contemptible, unfortunate or stubborn person, place or situation (sometimes used ironically or humorously); bastard; git.That cowson still owes me five quid.Millwall lost again. What a cowson. formscowsons