如果一个人被形容为 stick in the mud 那就说明此人很保守，墨守成规，不喜欢新事物，缺乏创意。

例句

John is such a stick in the mud, he never wants to go anywhere other than Spain for his holiday.

Don't be a stick in the mud; let's try the other restaurant for a change.

请注意

不要混淆另一个短语的意思。As clear as mud 意思是混乱，不清晰。

For example: His instructions were as clear as mud.