smokey bear

Short definition from Wiktionary

Noun

1. 1
   Alternative form of Smokey Bear (“highway patrolman”).
2. 2
   A policeman, especially a highway patrol officer.
3. 3
   A ranger or park service employee that deals with the public.
4. 4
   A firefighter.
5. 5
   A campaign hat.
6. 6
   An aircraft used to drop defoliants in the Vietnam War.

Proper noun

1. 1
   A fictional bear dressed as a ranger who acts as a symbol of forest fire prevention, with the slogan "Only you can prevent forest fires."