Japanese by Example
Learning through examples in manga

Littering with ポイ捨て

ポイ() is short for ポイと()てる. It refers to littering small pieces of trash in public places such as streets and parks.

There is a connotation of throwing the trash without thinking about it much, so the term is often used with small pieces of trash, such as drink cans, plastic bottles, candy wrappers, and shopping bags.

Further reading

ポイ捨て|俗語 (edewakaru.com)

Examples

ふだつきのキョーコちゃん » Volume 2 » Page 47