noun

• (archaic) A brief outburst or period of bad temper; a snit; also (rare) any brief outburst (for example, of laughter).
  "[A]s if / Returning homevvards in a furious Tiff; / Your Hoſt declares, he's ſorry at his Heart, / And humbly acts the penitential Part."

verb

• (intransitive, informal) To be involved in a (generally small) argument or disagreement; to squabble.
  "I very much indeed approve / Of maidens moderating love / Until they've twenty pounds; / […] / Until the twenty pounds were safe, / She tiff'd at Tim, she ran from Ralph, / Squire nodded … deuce a curtsy!"

noun

• (computer graphics file format) Alternative letter-case form of TIFF (acronym of tagged image file format).

verb

• (intransitive, British India) Synonym of tiffin (“to eat a (light) midday meal or snack; to have lunch, to lunch”).
  "Besides that one to which the permanent residence was attached, Mr. Augustus had several outlaying factories, which he visited from time to time, to superintend the manufacture of his indigo; at all of these he had little bungalows, or temporary abodes, where we tiffed and passed the heat of the day."