Is it acceptable? Well that really depends on how you look at the issue.
First thing first: passwords are supposed to be secret. This means other people should not have access to your password, and should not be able to see it, blah blah blah. (This has been covered by the other answers for the most part.) What people don't consider is what happens when you make a mistake (and you will). If you're in the IT world (especially Software Development / Programming / whatever you call yourself as a person who writes software for a living) you usually end up being a touch-typist. You learn to type fast, precisely, and without even needing to look at the screen or keyboard. (In fact, I typed the majority of this answer while reading some Android and Twitter documentation.)
What this means is that, while mistakes end up less frequent in terms of mistakes-per-time-typing (generally with our speed we gain accuracy) this ends up usually resulting in much more prevalent mistakes. That is: your mistake ends up blowing up extremely quickly. I cannot tell you how many times I've thought I was in a specific window (like a login window) to find out I'm typing my password into an Email I was formulating for a user, or into my "username" field because I missed the "tab". (I've even accidentally sent secured passwords to strangers via internet chats, I've changed them since, but it can happen.)
So when this happens, ask yourself: can I afford for this password to be accidentally sent to someone else?
Second, we type passwords in a lot, which means they become part of us. I used to use a passphrase that I'm going to post here as an example due to the fact that it's been retired from my usage for literally half a decade:
This is not my beautiful house!
This was literally the password I used to access certain systems that were, in fact, not in my home. These were systems that I needed to always remember access for, prevent brute-force attacks for, and avoid the possibility of someone reading over my shoulder. (It's hard to follow an 8-12 character password, it's harder to follow a sentence of a password.) Now, after typing this time-and-time again it literally became second nature, and that sentence (which, hilariously, is one of the lines from "Once in a Lifetime" by the Talking Heads) became the single fastest sentence I can now type.
So take one of these inappropriate passwords you came up with (which are also, conveniently, designed to require a lot of thinking power to process) and ask yourself: am I comfortable with burning this information into my brain and nature? You will literally be thinking about these things on a very frequent basis, and if the password is something you don't feel inappropriate thinking about, then I guess that answers that.
Third, I don't think you realize what the consequences are if someone does find this out. Especially in the area I live in, employer-employee relationships are 100% at-will, and I mean 100%. My employer can literally fire me for whatever they want that is non-discriminatory (they can't fire me for being a male, but if I start a hate-group against females then I'm fair game). Can you really afford to take such a risk? (This is just for completeness, other answers already covered this.)
I once had a coworker whose password was "
F---myj0b", literally. (He loved it: he bragged a lot about that password.) One of the managers overhead this bragging, and several minutes later the coworker was walked out of the building and ordered never to return. Is that a risk you're willing to take?
Risk it if you want, but don't say we didn't warn you.