yawner

n.a person who yawns

1. During the lecture, half of the class turned into yawners, barely able to stay awake.
   在讲座中，半个班的同学变成了打哈欠的人，几乎无法保持清醒。
2. The movie was so slow and uneventful that even the most enthusiastic viewer became a yawn-er by the end.
   电影节奏缓慢、毫无起伏，甚至最热衷的观众也在最后变得打哈欠。