涂鸦用英语是 "graffiti"。来源是希腊语，原意为 "写在墙上的东西"。例句：

The walls were covered in graffiti.

中文翻译：墙上满是涂鸦。

He was arrested for graffiti.

中文翻译：他因涂鸦而被捕。

Graffiti is often seen as a form of vandalism.

中文翻译：涂鸦常被视为一种破坏行为。