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.
play cat and mouse with someone: tease or fool someone
Example:
The spy movie was suspenseful because of the way the hero played cat and mouse with the double agent.
put all one’s eggs in one basket: to rely too much on a single thing
Example:
One of the cardinal rules of investing is not to put all your financial eggs in one basket.