The really short bus.
2. adjective. (derogetory) describes student who rides such a bus. See also, special.
3. adjective. (derogetory) lacking in mental capacity, or stupid. See also retarded.
2. The kid in the wheelchair was often called a short bus kid behind his back.
3. You put your shoes on before your socks? That's a pretty short bus solution.
"The short bus picks up my neighbour's kid every morning. He looks like that banjo boy from 'Deliverance.' In other news, I have a first-class ticket to hell."
Teacher: And we're taking a short bus!
Class: *is riding the short bus on the highway*
Other cars: *point and laugh*
Class: *is mortified*