乱扔垃圾不礼貌的英文表达是 "pttering is impopte"。

"Littering" 是指乱扔垃圾的行为,"impopte" 是指不礼貌的。这两个词都来自英语,都是常见的英语单词。

下面是几个例句:

Littering is impopte and it can also have negative effects on the environment.
Please don't ptter. It's impopte and it shows a lack of respect for the community.
Littering is not only impopte, but it can also result in fines or penalties.

对应的中文翻译是:

乱扔垃圾不礼貌,而且也会对环境造成负面影响。
请不要乱扔垃圾。这是不礼貌的,并且显示出对社区的尊重不足。
乱扔垃圾不仅不礼貌,而且还可能导致罚款或处罚。