One Thumb Driver Edit Meaning

1.

Lacking the ability to apply mechanical skills intelligently.

Example: Driving with your thumb up your ass.

Example: Driving in the passing lane while everyone is passing you.

I passed a one thumb driver on their cell phone who didn't have a clue they were holding up traffic.

See idiot, braindead, clueless, dumb, retard, moron, smart, intelligent, brain, genius, intellectual