MEANING: noun: A notch or a small cut.
verb tr.: To make a small cut or notch.

ETYMOLOGY: Of uncertain origin, perhaps a variant of niche. Earliest documented use: noun: 1726; verb: 1880.

KITCH - where you prepare din-din

NIT, DH - Now batting, Willie Nit, Designated Hitter

NITCO - "Our Specialty: the eggs of Pedculus humanus capitis"