1) Where did you fool around? 你到哪里疯去了?
fool around=horse around 俚语成分中多一些

A dialogue:
-Er... Dad, haven't you go to bed?
-I am right here waiting for you, tell me, where did you horse around?
-Sorry, daddy, I met one of my old classmates today. And we had a party and chattered a lot. Sorry for being late. I should have phoned you, dad!