What is the meaning of idiomatic expression light sleeper?

A "light sleeper" is someone who wakes up easily and often. This means they are easily disturbed by noises, changes in temperature, or even the slightest movement.

Here's a breakdown of the meaning:

* Light: This refers to the ease with which the person wakes up. It suggests they are not in a deep sleep and are easily aroused.

* Sleeper: This simply means someone who sleeps.

The phrase "light sleeper" implies that the person's sleep is fragile and sensitive to external stimuli. It's the opposite of a "heavy sleeper", who can sleep through anything.

Here are some examples:

* "I'm a light sleeper, so I need complete silence to get a good night's rest."

* "The dog barking woke me up, I'm such a light sleeper."

* "I can't sleep in hotels because I'm a light sleeper and the noise always wakes me up."