We use this expression to ask what someone did – especially if we think it was something unusual.
You can use this phrase in ………… language.
A: I had the most fantastic day.
B: Really? What did you get up to?
A: I did my first bungee jumping, actually. It was brilliant.
A: I heard that Peter’s in trouble. What did he get up to this time?
B: I think he had a huge conflict with the boss.
A: Oh my god.