Definition of catch colt in English:

catch colt

Pronunciation /ˈkatʃ kəʊlt/

noun

US
  • 1 dialect A horse or foal sired by a stallion not of pure breed or stock.

  • 2 dialect, slang A person born to unmarried parents; an illegitimate child.

Origin

Mid 19th century; earliest use found in Porter's Spirit of Times. From catch + colt.