Webster's Revised Unabridged Dictionary · 1913

Miff

Miff (mif) , noun

[Compare Prov. German muff sullenness, sulkiness, muffen to be silky, muffig sullen, pouting.]

A petty falling out; a tiff; a quarrel; offense. — Fielding

Miff , transitive verb

To offend slightly. [Colloquial]