Do you know ghouls from goblins and ghosts?
early 14c., crouken, imitative or related to Old English cracian (see crack (v.)). Slang meaning "to die" is first recorded 1812, from sound of death rattle. Related: Croaked; croaking.
1560s, from croak (v.).
A mixture of crack cocaine and cocaine: A new wave of narcotics with names such as ''croak'' and ''parachute'' is hitting the nation's streets (1980s+ Narcotics)