Let's say, I'm standing beside the counter in a bank, my back against the counter (that is, I'm almost leaning against the counter). Can I describe my position this way:

I'm backed up against the counter.

I would greatly appreciate it, if you gave your own sentences, anything that rolls off your tongues, if mine strikes you as odd.


PS: here's a picture that will give you a ball park idea of what I have in mind.

The link didn't work for me, but based on what you said "My back is to the counter" is a good choice.

If you say "I'm backed against" it sounds like you've been forced there, by the crowds, by a tiger in the room, by something other than where and how you choose to stand.
MrPernicketyCan I describe my position this way: I'm backed up against the counter.
You can. Usually though, if you use the expression "backed up against" it implies that you have been forced into that position by, for example, a crowd, or someone rudely walking too close to you, or even by an adversary.

Here are a couple of alternatives that might be better to describe a voluntary situation (such as the one in the picture):
I was standing with my back to the counter...

I was facing away from the counter...
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 BarbaraPA's reply was promoted to an answer.
Thanks, guys !

Yeah, I saw the phrase "I'm backed up against the counter" in a story where a bank robbery was in progress and the thugs herded the people in the bank to the counter so they wouldn't meddle.

Thanks for your examples, sometimes I get stuck for words, when I need to sketch in a simple situation.