Woah buddy! Ya came at me guns blazing there! Brought out the post quotes and everything. 

I’m simply trying to point out that you are going to run into people who are just “douchy” as you say, and it’s not something you can control. Especially in a work setting when people often have a personality that is different when they aren’t working. The only other instance I can think of this phrase being used in popular culture is with your spouse or family. People are around family so much that they start getting irritating. Waiting about 20 minutes to have a cup of coffee before speaking to them can avoid some trivial family spats. I agree, it’s not the most eloquent way to express yourself - but people don’t conform to how you want them to act unfortunately. 

Also, if it’s never been said to you don’t worry about it! It will probably never be said to you - it’s a phrase mostly said on TV or in hyperbole. The last time I was in a similar situation with a family member all I could get out was an unintelligible dazed sounding grunt and a hand raise. My cousin laughed at me and came back to talk to me in half an hour. 

You definitely seem like a Leslie Knope type if you’re feeling so passionately about this. That’s great! But even she had to come to terms with the fact that everyone around her wasn’t always positive. I’d just take pride in the fact that you strive to be polite even when you’re tired, that’s really all you can do!