play at

US /pleɪ æt/
UK /pleɪ æt/
"play at" picture
1.

~のまねをする, いい加減にやる

to do something in a way that is not serious or committed

:
He's just playing at being a doctor; he has no real medical training.
彼はただ医者のまねをしているだけで、本当の医療訓練は受けていない。
Don't just play at your work; put in real effort.
仕事にいい加減に取り組むな。真剣に努力しろ。