"Hit the ceiling" means to lose your temper and really get angry. The image is of a person getting so angry that when they jump up and down, their head hits the ceiling. You would use this idiom in a case where something really bad has happened, and you anticipate that someone will become furious as soon as they find out. When Dad finds out that I wrecked his car, he is going to hit the ceiling!
you got it right
I'm about to explode! Flew off the handle, blew up, hit the ceiling or roof
"To be" is not an idiom - it's a verb.
"Sky high" just means very high. You usually hear this as "blown sky high," which would mean either (literally) something exploded and was thrown high in the air, or (figuratively) that someone's plans were thoroughly destroyed.
Pest is not an idiom. It's a word.
Does it make sense if you translate it literally? If it does, it's not an idiom. Have you ever seen anyone actually hit a ceiling? No, so this must be an idiom.
important parts
you got it right
To 'hit the bottle' means to drink excessively, to get drunk.
To 'hit the bottle' means to drink excessively, to get drunk.
I'm about to explode! Flew off the handle, blew up, hit the ceiling or roof
No, "hit the hay" is an idiom that means to go to bed or go to sleep. It is not a metaphor, as it is a commonly used phrase with a specific meaning that is understood by native English speakers.
Lucky if you hit it. Commonly means lucky if you get it also. The odds are against you.
"To be" is not an idiom - it's a verb.
This is an idiom meaning to narrow your focus down. It can also mean to narrow your aim and focus on one thing to hit. Picture the zero as a target and you get the idea of the idiom.
"Sky high" just means very high. You usually hear this as "blown sky high," which would mean either (literally) something exploded and was thrown high in the air, or (figuratively) that someone's plans were thoroughly destroyed.
Pest is not an idiom. It's a word.