Definition of scooby in English:

scooby

(also scoobie)

noun

Scottish
informal
  • "not to have a scooby": = not to have a clue.

Origin

1990s; earliest use found in The Glasgow Herald. Short for ScoobyDoo, the name of a cartoon dog which features in several U.S. television series and films (which typically include the name of the dog in the title), as rhyming slang for clue.

Pronunciation

scooby

/ˈskuːbi/