and I don't play one on TV

and I don't play one on TV

A phrase used humorously when one is discussing or giving an opinion on something they have an extremely limited knowledge of. I'm not a doctor, and I don't play one on TV, but that cut looks infected to me.
See also: and, on, one, play, TV
Farlex Dictionary of Idioms.
See also:
  • are we having fun yet
  • Are we having fun yet?
  • as you do
  • AWHFY
  • a right one
  • how the mighty are fallen
  • how the mighty have fallen
  • believe it or not
  • bion
  • will wonders never cease