I see these buses around Springfield all the time.
And yes, they really exist, here is their website, golamers.com if you don't believe me.
I don't see a motto there. I can't help but try to help them out with one? Here are a few off the top of my head...
Why just be Lame when you can be Lamer?
Did you ever want to ride a Lamer?
Once you go Lamer you won't go back.
Official tour bus of Britney Spears and Michael Jackson.
First we were dorks, then losers- now we are Lamers!
If you can't walk just call Lamers!
Proud Sponsor of the Lamers Olympics!
(You know, their url "golamers" is kinda cruel when you think about it.)
Since my creative readers comments are usually funnier than my posts I can not wait to see what you come up with!