1. (n.) a yellow residue that is left behind on teeth as a result of over-consuming large amounts of pure alcohol, and not brushing your teeth. hill billy
2. (adj.) savage, uncivilized, barbarian, whorish, not having any moral boundaries, untalented, drunk
1. Guy #1: Dude, I was making out with that girl last night, but I didn't want her to go down on me cause she had lots of tartar on her teeth.
Guy #2: Yea, sure, THAT'S why you didn't get laid.
2. Reporter on TV: ...and the dog walked itself home. Coming up next, "Teens-Turned-Tartar."
Guy watching TV at home: "Hey honey, come watch, they're about to interview Miley Cyrus!!"