I love Gentoo precisely because of Portage, but I think the most badass package install/uninstall syntax has to be that of (the defunct?) Sorcerer Linux:

Sorcerer’s tool terminology is based upon magic words. For example:

• a tool to download, compile, and install software is called a “spell”
• to install a package is “cast”
• to remove a package is “dispel”
• a set of available spells is called a “grimoire”