The game does not have "backpack" as an official term, so please do not use it so as not to confuse people who might not know what you are referring to, since, as I said, it's not an official game term.

а где пруфы на все это дело?))

If I legally use two armors, one with the Cheat card , the second by a Hireling, and Curse say "Lose The Armor You Are Wearing", do I lose both armors?
Cheat! does not change what an Item is. If a Cheated Item is Armor, it's still Armor and it's still going to get taken by a Curse! that takes away Armor. However, if you're Hireling is wearing the Armor, you aren't, so it would not get taken by that specific Curse!

Hmmmmmmm. "Lose your armor" is often found in Bad Stuff and on Armor Items that allow you to wear them with other Armor Items. It actually refers to the Armor that you are using at the time. I can not find a reference in the database to "Lose an Armor" (and I didn't expect to find one), but I think we can agree that that would target any Armor Item you have in play, as opposed to only the Armor you are using, or "wearing," at the time.

Хммм. Выражение "Теряешь свой броник" часто встречается в Непотребствах и Брониках, которые можно носить вместе с другими Брониками и относится к Броникам, которые вы используете в данный момент.
Я не могу найти ссылки в базе данных на "Теряшь Броник" (впрочем, я и не ожидал, что найду), но я думаю, что мы можем согласиться, что эта фраза подразумевала бы потерю всех броников, которые есть у вас в игре, а не только тех, которые вы используете или "носите" в данный момент.

Please note that the wording is VERY specific. "Lose an Armor", "Lose Your Armor", and "Lose the Armor You Are Wearing" mean three different things.

There are three possible wordings:
"Lose The X You Are Wearing" - if you aren't wearing X, even if you're carrying one, then you're safe. But if you're wearing more than one X, you lose them all.
"Lose An X" - any one X on the table is fair game.
"Lose Your X" - this is the tricky one. Some are asserting it's equivalent to the first statement; others are asserting it's the same as the second. I, personally, think that it means you lose any X you have in play, anywhere on the table, since it doesn't just say "lose one," but I'm a jerk.

First, "using" and "wearing" are synonymous when it comes to Armor, Footgear and Headgear. But, what I said is that you are not wearing something that your Hireling is.