dumper
🇺🇸
/ˈdʌmpər/
🇬🇧
/ˈdʌmpə(r)/
A person who carelessly discards something, especially in an inappropriate place.
The environmentalist called the litterer a 'dumper' for leaving trash in the park.
環境保護者は、公園にゴミを置き去りにした人を「ダンパー」と呼びました。