Shell prompts are, by definition, pretty dull. So, if you spend a lot of time looking at one, why not make it more fun by… replacing it with a hamburger!
Actually, you can replace the thing with any emoji character (as long as you have an emoji font installed — get a free one here), and Andre Torrez has written an easy guide which explains how you can do it. If you just want to give it a quick try, type this in at the prompt:
If you’re after something more permanent, you need to edit .profile, .bash_profile or .bashrc depending on your setup, but Torrez can guide you through that. [Andre Torrez via Boing Boing]