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1.
1) Portmanteau of the words "Tarheel" and "Wheel"

2) A slow driver from North Carolina, usually from rural parts of the state (Charlotte and Triangle drivers are fast) going inexplicably slow on the interstate.

3) Found primarily near the North Carolina border along Interstates 85 and 95.
Oh, it's a Tar-wheel!
by LordLoudoun May 09, 2011