Every man and his dog wanted to interview me after I won the race.
(every man and his dog means many people)
（every man and his dog指所有的人）
I'll be right back-I've got to go see a man about a dog.
(go see a man about a dog means go to the bathroom)
（go see a man about a dog指去洗手间）
This has always been a nice hotel, but it's going to the dogs.
(go to the dogs means deteriorate in quality)
（go to the dogs指每况愈下）
At first my marriage was all puppies and rainbows, but then reality set in.
(puppies and rainbows means perfect)
（puppies and rainbows指完美的）
That's just a fish story. Don't try to fool me.
(a fish story is a big lie)
（a fish story指大谎话）