I wouldn't be caught dead in sleeping during the class.
Thieves will be caught.
The idiom is "dead certainty". It means it's in the bag = this is a dead certainty = this is cinch
It means that Tom got on the train at eight o'clock. "Caught" just means he was there on time and made it into his seat.
If something "catches" your eye, it has snagged your attention. You are focused on that thing for whatever reason.
It is a fishing term. At first is seemed as if you were caught ( hooked ) but you escaped capture or consequence.
This is not an idiom. Idioms make little or no sense unless you know the definition. This sentence makes perfect sense, so it is not an idiom. The dead fish smelled so bad that even as high as Heaven, you could smell them.
To be 'as dead as a donut' is to be utterly dead, devoid of life (when applied to people, plants or animals) or finished with, unusable (when applied to inanimate objects).
Things tend to be quiet at night, as if they were "dead." So if something is "dead as night," it means it is very quiet, not moving around, not making noise.
They are implying that they have "killed" you - you are in big trouble with them, and they are going to make you pay for whatever you just did to them.
"You threw me for a loop" means that you surprised me or that I wasn't expecting that. It could also mean it caught you off guard and you totally weren't expecting it.
The idiom "they froze in their tracks" means that they stopped what they were doing. Example- The robbers froze in their tracks when they heard the alarm.
What do you mean by 12 dead?