Play up. Could you take them a look? She got two days off work by playing up to the boss There's no need to play up to me, I'm going to lend you some money . If you keep playing up at school! The teacher will kick you out. When I was a child I used to play up with my sister. I don't know what's happening with my laptop. It's playing up again. The other day I asked some friends around to watch a film but the tv started to play up and eventually broke down.