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A convention where retarded people connect. Usually results in the death of the bus driver. Activities include sticking your tongue out and rapping.
Person a: Where did Joshua go?

Person b: He went to the retard convention
by Sped man October 12, 2016
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1. In literal terms, a group of mentally handicapped people in a room or area.
2. In figurative terms, a gathering of a bunch of fucking morons to talk about their idiotic ideals.
"Hey dude are you going to go to that G-Eazy concert?" "No! I'm not going to that retard convention! It's a waste of time.
via giphy
by DJmemestar July 27, 2016
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