Select the most appropriate meaning of the given idiom.

Get up on the wrong side of the bed

The correct answer is Someone who is having a horrible day.

Explanation:
The idiom "get up on the wrong side of the bed" is a common English expression. It is used to describe someone who starts their day in a bad mood, is easily annoyed, or seems to be having a very bad or horrible day from the moment they wake up.
Historically, this phrase comes from an old superstition that it was bad luck to get out of bed on the left side (which was considered the "wrong" or unlucky side). Over time, it evolved into a figurative expression meaning to begin the day in a grumpy, irritable, or generally unpleasant state.

Let's evaluate the other options to understand why they are incorrect:
1. "Destroy or ruin a plan": This describes idioms like "throw a wrench in the works" or "spoil the broth", not getting up on the wrong side of the bed.
2. "Someone who is having a good day": This is the exact opposite of the idiom's actual meaning.
3. "Go to bed or go to sleep": This refers to idioms like "hit the hay" or "hit the sack".