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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)