What's a good one line bash script that'll send and endless stream of black images to a print queue? The shorter the better so I can type it quickly then make a sharp exit.
A good bash script that'll send an endless stream of black images to a print queue can be written like this. 

convert -size 300x300 canvas:black - | lp -n 99

The color of the sheets will be black, allowing the printer to waste as much possible ink per sheet while the '99' at the end of the command would control the number of sheets that are to be printed out.
Awesome, thank you! I will test this out and get back to you if something went wrong.
I'm glad I could help. Hopefully you think about the potential consequences in case you are caught, as it might not be worth a potential termination or leagal actions that could ensue from such an action.
That answer is irrelevant to the question
You might be right, but I'm just looking out for you.