slow bus 

Used to describe someone who acts or does something stupid.

John: There are 45 states.
Kenneth: Slow Bus!

slow bus by SouthJumper December 15, 2008

slow bus 

Some one who is ...well, slow.
Some one who rides the short bus is slow, and so we just say slow bus.

"Whats 1+1.. duhhhh?"
"You are such a slow bus."
"No im......-"
"No im, what."
"Dur i forgot."

slow bus by ambie September 8, 2006