catch out

verb5

1. •
   To discover or expose as fake, insincere, or inaccurate.

   • Bishop Manning has his enemies, but those enemies have hardly ever caught him out on a point of theology or canon law. — 1939
2. •
   To catch (someone); to detect an error or blunder on (someone's) part.

   • The police caught me out on a lie.
3. •
   To take (someone) by surprise.
4. •
   To put a batsman out by catching the batted ball before it touches the ground.
5. •
   (slang, old-fashioned) To leave an area by jumping on a train; to ride the rails away.