Animal idioms

HAVE A WHALE OF A TIME

to enjoy yourself very much

We had a whale of a time on holiday.


LET THE CAT OUT OF THE BAG

to allow a secret to be known, usually without intending to 

I was trying to keep the party a secret, but Mel went and let the cat out of the bag.

TILL COWS COME HOME

for a very long time

I could sit here and argue with you till the cows come home, but it wouldn't solve anything.


IN THE DOGS HOUSE

If you are in the doghouse, someone is annoyed with you and shows their disapproval 

I'm in the doghouse - I broke Sara's favourite vase this morning.