finger

finger definition

1. tv.
   to point someone out; to identify someone (as having done something, been somewhere, etc.). : Pete fingered Marty as being the one who arrived first.
2. n.
   someone who identifies criminals for the police; a police informer. (Underworld.) : Taylor has become a finger for the cops.
3. n.
   an amount of liquor poured into a glass equal to the width of a finger. : Britney said she only drank one finger, but the glass was five inches in diameter!