I do the definition of a Bullshit Job. I sit at a computer, occasionally typing in some random numbers somebody else gives me, which will be replaced by new numbers in a few days. I don't know what the numbers do. Whenever we have any kind of meeting or instruction about typing the numbers in, or how sometimes you also have to tick a box on the system, I try to bring up the question of why any of this needs to be done and what would happen if we didn't do it and no one gives me a straight answer.
So usually I just record on the report that I typed the numbers in so when they look at the report they think I typed the numbers in so that makes my manager happy, but I actually type them in weeks later or sometimes not at all. I've been doing this for three years.