ph.

外出就餐

1. 对…敷衍了事；儿戏似地做
If you say that someone is playing at something, you disapprove of the fact that they are doing it casually and not very seriously.

2. （尤指儿童）假扮…玩，玩…游戏
If someone, especially a child, plays at being someone or doing something, they pretend to be that person or do that thing as a game.

3. 搞…名堂；想…念头
If you do not know what someone is playing at, you do not understand what they are doing or what they are trying to achieve.