be more fun than a barrel of monkeys @ 英語學習筆記

Brian: Do you know how many couples in the world simultaneous kissing record are?
Alice: Beats me. Maybe 1,000 couples, I guess.
Brian: According to a news report I read in The China Post, some 7,000 couples kissed at the same time in the Bosnian town of Tuzla in a bid to break the world record.
Alice: Wow. That's a lot of people. I wish I had been there -- that must have been more fun than a barrel of monkeys!
Brian: If we had been there, would you have kissed me?
Alice: Let me sleep on it.We're already late for the class. Let's run!

解析：be more fun than a barrel of monkeys == to be very funny or enjoyable (非常有趣)

beats me==考倒我了
let me sleep on it==讓我回家考慮一下

simultaneous