他穿着很随便的牛仔裤和T恤衫。

He was casually dressed in jeans and a T-shirt.

《牛津词典》

一般用在很随便的场合，朋友之间。

You can use this word around your friends, but not in formal situations or with strangers.

youdao

请举出一些他们非正式或者很随便的例子？

What are the examples do you have in terms of informality-casual?

youdao