An internal, extra-sensory detector allowing for the identification of retardedness and people acting retarded.
If it weren't for my excellent retardar, the guy on the cell phone, while riding his bike would have become road kill.
by Izzyhart July 28, 2008
Having the ability to pick people with disabilities out of a crowd.
Mandy: That kid is totally autistic.
Brian: How can you tell that by just looking at him?
Mandy: I have retardar.
by Diane Mower July 25, 2008

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