A person who is not very smart; a little slow. Referring to the buses in a school district that transport the "special needs" students.
When Jessica Simpson asked if tuna was fish or chicken, some people said she might be a short bus rider.
by Lizzie H October 15, 2005
someone mentally retarded.

one who rides the short bus to school.
"that bitch is SO stupid. what a short bus rider."
by amy christ April 29, 2005
2 mg yellow and rectangle zanax bars; causes "slowness"
Look how zooted he be lookin... you know he be on them short bus riders!
by natedogg51 May 03, 2014

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