Stenamager Share definition Flag (noun) A person who intentionally uses bad grammar for aesthetic or to annoy others. Justin, that stenamager, refuses to admit the importance of differentiating between 'their', 'there', and 'they're'. Stenamager by quotesandanecdotes March 3, 2020 0 0 Get merch Get the Stenamager mug. Buy Now — $32.95 See more merch