ˈeye tooth BrE AmE noun [countable]
[ Date: 1500-1600 ; Origin: Because it is directly below the eye ]
1 . somebody would give their eye teeth for something spoken used to say that someone wants something very much:
I’d give my eye teeth to be able to play the piano like that.
2 . one of the long pointed teeth at the corner of your mouth SYN canine tooth