It's a yawner.

It's a yawner.
It's a yawner.

It's a yawner.
这是个无聊的人[东西,事情]

yawn v. 打呵欠
yawner n. 打呵欠者
It's a yawner. 这个人在打呵欠(或直译:这个打呵欠的人)

指那个东西很无聊~ 书~电影之类的~
^^