Webster's Revised Unabridged Dictionary · 1913

Tiff

Tiff , noun

[Originally, a sniff, sniffing; compare Icelandic {not transcribed}efr a smell, {not transcribed}efa to sniff, Norw. tev a drawing in of the breath, teva to sniff, smell, dial. Swedish tuv smell, scent, taste.]

1.
Liquor; especially, a small draught of liquor.
Sipping his tiff of brandy punch. — Sir W. Scott
2.
A fit of anger or peevishness; a slight altercation or contention. See Tift. — Thackeray

Tiff , intransitive verb

To be in a pet.
She tiffed with Tim, she ran from Ralph. — Landor

Tiff , transitive verb

[Old English tiffen, Old French tiffer, tifer, to bedizen; compare Dutch tippen to clip the points or ends of the hair, English tip, n.]

To deck out; to dress. [Obsolete] — A. Tucker