Top Definition

Remedial class for slow learners. Do9 classes are usually held in the basement of a middle or high school. Do9 students can usually be found riding the short bus to school.
Damn Rico, you don't know what 2+2 is? I see why you're in Do9!
#dumb ass #d09 #retard #short bus #nerd
by ol skool November 01, 2010
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