"Write it off" means to dismiss something.
To laugh allot
The meaning of the idiom "to slap the back off you" is fairly straightforward. It implies an exaggeration, that one would slap someone else so hard that their back would come off.
Can you figure out the meaning by defining the terms literally? No, so it is an idiom. Literally, it means to remove something, but figuratively it means for an airplane to get off the ground.
It means being ticked off, or very mad.
Showing off, being well dressed and flashy.
To lose ones temper and react violently.
Old sailing slang meaning to be no longer in danger.
Nothing. To get off the hook, however, means to escape punishment.
"To be" is not an idiom - it's a verb.
Something that can happen really fast or in the "blink of an eye"
That usually pertains to a weapon discharging when you don't want it to.
Nothing. The correct idiom is "get OFF your high horse," meaning stop acting so conceited as if you are above everyone else.