Firstly, here are the answers to yesterday's test.
1 Indian summer
3 Out of the blue
5 Nip it in the bud
6 Once in a blue moon
I hope you did better than MR Bean!
OK, onto dog house.
Unless you're a dog, it's not a good place to be. It's a metaphor for being in disgrace. It particularly applies to husbands who come home late and drunk. They would definitely be in the dog house and have to clean a lot of windows to make amends!
Here's a guy who's been in the dog house in his colourful life; the man with the three string guitar, Seasick Steve. His life story is pretty interesting; if you want to read more and find out how old he is, check the Wiki link.