A policeman or policewoman.

ETYM Old Fren. creste, French crête, Latin crista.
1. The top line of a hill, mountain, or wave.
2. A showy growth of e.g. feathers or skin on the head of a bird or other animal.
3. (Heraldry) In medieval times, used to decorate a helmet.

Ridge or fold resembling a crest.

A hanging fold of loose skin on an elderly person's neck.
turkey's wattle; flap of skin under the throat
loose skin hanging at throat.

1. (Heraldry) Bearing an heraldic device.
2. (Of a bird or animal) Having a usually ornamental tuft or process on the head; often used in combination; SYN. topknotted, tufted.
3. (Of a knight's helmet) Having a decorative plume; SYN. plumed.

Bearing crest.

ETYM French, from coquet, coquette, coquettish, orig., cocklike, strutting like a cock, from coq a cock. Related to Cock, Cocket, Cocky, Cockade.
A seductive woman who uses her sex appeal to exploit men; SYN. flirt, vamp, vamper, minx, tease, prickteaser.

ETYM Malayan kakatûa.
White or light-colored crested parrot of the Australian region; often kept as cage birds.
Any of several crested parrots, especially of the genus Cacatua. They usually have light-colored plumage with tinges of red, yellow, or orange on the face, and an erectile crest on the head. They are native to Australia, New Guinea, and nearby islands.
There are about 17 species, one of the most familiar being the sulfur-crested cockatoo C. galerita of Australia and New Guinea, about 50 cm/20 in long, white with a yellow crest and dark beak.