litterbug
/ˈlɪtərˌbʌɡ/
noun
- A person who carelessly drops trash or leaves waste in public places instead of using a trash can.
- Our neighborhood started a campaign to catch the litterbug who keeps dumping trash on the sidewalk.
- The park ranger fined the litterbug for leaving soda cans on the grass.
- My little brother is a litterbug — he always drops candy wrappers on the floor.
Antonyms