A person who will take any kind of drug and/or medicine, whether or not the substance is known, just to see its effect.
Kenny is a chuckwagon head, and will even take pills he finds on the ground.
by [Al]hambra August 07, 2006
A person who will take any drug, without knowing the drug, just to see what it does.
John is such a Chuckwagon Head! He takes any kind of drug that is offered to him!
by YEA ITS ME November 16, 2006

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