teeny /ˈtiː.ni/adjective 1noun 1forms 3 adjective1 •(informal) Very small; tiny. noun1 •(informal, rare) A teenager; a teenybopper.When I was a teeny in the late 80s, I like^([sic]) 50s/60s music like that which you listed below as well as the Beatles. I simply found it fun and easier on the ears than Madonna and Paula Abdul. — 2000 formsteenies · teenier · teeniest