-kə(r) noun
( -s )
1. : an animal that croaks (as a frog)
2. : any of various fishes especially of the family Sciaenidae that produce croaking or grunting noises (as certain grunts and surf fishes): as
a. : atlantic croaker
b. : freshwater drum
c. : queenfish
3. : one that murmurs, grumbles, or complains unreasonably ; especially : one that habitually forbodes evil
it didn't turn out as bad as the croakers thought
4.
[ croak (I) (to kill) + -er ]
slang : doctor