Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
look a gift horse in the mouth: complain if a gift is not perfect
Example:
So what if you had to ride in the back of the pickup truck? At least you didn’t have to walk – don’t look a gift horse in the mouth.
look like the cat that swallowed the canary: look very self-satisfied, look as if one just had a great success
Example:
She looks like the cat that swallowed the canary – I heard she’s planning on divorcing her husband, and suing to get her hands on his wealth.