This idiom suggests that someone is an expert, or vastly experienced, having dealt with a field or activity in all of its aspects. A clear example would be an auto mechanic, who knows how engines perform and also how they are built.
This is comparable to the idiom about familiarity with a location, which is "I know it like the back of my hand."
This is not used as much as it once was, but people will know what you mean if you use it; it's not obsolete.
in on it means you know whats going on or about a certain subject. "when it comes to penguins I am in on it!" i might say
It is not an idiom, it means your nose is itching.
This is not an idiom. Idioms are phrases that don't mean anything unless you know the definition. This is a sentence saying that your photograph or painting or drawing is sitting atop a piano.
He was behind on what their doing know
This is not an idiom. They mean that someone literally has a tapeworm inside their intestines. It's a parasitic organism.
It means that you really know it.
This is not used as much as it once was, but people will know what you mean if you use it; it's not obsolete.
Knowing something "by heart" means you have it memorized and don't need to have any notes or reminders.
If something is inside out, it means that it has been turned so that what was once inside is now outside. You hear this most often in reference to clothing. It's easy to turn a shirt or pants inside out, especially when they go through the wash. You might also hear this used to refer to any situation which seems backwards to you.
It's not an idiom. Idioms make no sense unless you know the meaning already. "No end" means just what it looks like -- something is endless.
Can you literally be inside of a pickle?No, so it's an idiom. It means in trouble.
I don't know what you mean by "common phrases of," but the idiom "over and above" just means "more than what was agreed upon."
in on it means you know whats going on or about a certain subject. "when it comes to penguins I am in on it!" i might say
To crow about is to brag or boast about something. Let others know some news.
I guess its an idiom and i don't know anything El's
It's not really an idiom. It means "what are you thinking about."