Is it possible to make a random slogans without using a plugin?
Not really, it would need a plugin or file edit of some sort because it would need PHP/SQL which you can't do by default.
Awwww... Where is the plugin located?
Don't think there is one currently.
Funny, I saw a Random Slogan plug-in somewhere. Now where did I see it...?
If you don't know where it is, you shouldn't post...