He mouthedoff to a TV camera and later had to apologise.
他装腔作势了地说对摄象机和必须以后道歉。
2
He mouthed a few obscenities at us and then moved off.
他不出声地朝我们骂了几句脏话然后离去。
《牛津词典》
3
Many Americans may know Kazakhstan from the 2006 movie Borat. The film erroneously painted the country as a far-off land that produces foul-mouthed goofballs like the star of the movie.