nagavator

a person in the passenger's seat (usually a woman) who nags instead of navigates; a backseat driver

Jane: I think we're lost, maybe I should drive, turn here, you missed it, watch out for that squirrel, can't you drive?

Dick: Not with you carrying on like that. Geez, you're such a nagavator.

by madelinemouse July 14, 2005