Yes. It means to be in some trouble or facing a hard decision.
Up against it, back against the wall, up against the wall is not an enviable position to be in. It means you are not in a good spot, you are in trouble with forces closing in on you. Usually used at work to mean that there is a lot of work to do and it is likely very difficult to achieve a goal.
The inability of students to think up their own sentences makes me bang my head against the wall.
No. The word "idiom" is a noun. An idiom is a term or phrase whose meaning is different from the separate words in the term. For example, the idiom 'keep up' has little to do with keeping anything or with an upward direction. It means maintaining (keeping) one's relative position as it changes (goes up, i.e. increases in elapsed time or distance).
pay attention.
This isn't an idiom. I'm not sure what it's even supposed to mean. You probably heard some kind of children's slang, which means you'd have to ask them what they meant by it.
Up against it, back against the wall, up against the wall is not an enviable position to be in. It means you are not in a good spot, you are in trouble with forces closing in on you. Usually used at work to mean that there is a lot of work to do and it is likely very difficult to achieve a goal.
The inability of students to think up their own sentences makes me bang my head against the wall.
The idiom 'driving me up the wall' means that something is annoying or exasperating you. It originates from a person trying to escape something by literally climbing up the wall.
Back Up Against the Wall was created in 1973-02.
I think you mean "drive someone up the wall," which means to make them so frustrated that they are thinking of climbing the walls to escape.
The shot glass may shatter if you throw it against the wall. The opposition had him up against the wall.
to bang your head against a brick wall
Up Against the Wall - 1991 is rated/received certificates of: USA:PG-13
It means that you drive them up to a wall in a vehicle. I believe you mean the idiom phrase "drive you up the wall," which means to frustrate you to the point where you feel like climbing up the wall to escape from them.
This is not an idiom. It is an expression whose meaning may be deduced from its component parts, unlike an idiom, whose meaning cannot be deduced from its component parts. It means having extremely limited options while being forced to act, like a person who is cornered in a fight.
Drinks "up against the wall" generally refer to a drink containing Galliano. The Galliano bottle is very tall and requires somewhat sturdy storage, i.e. leaned against a wall. The drink a "Sloe Screw up against the wall" is a combination of Sloe Gin, Galliano, Southern Comfort, Vodka, and Orange juice.
It's a way of showing you're very frustrated. The image is of you being so upset that you're banging your head on the wall because you can't think of anything else to do.