three-peat

[three-peet, three-peet]

Trademark.

a third consecutive victory, as in a major sports championship.

verb (used without object)

to win a third consecutive victory.

Origin of three-peat

An Americanism dating back to 1985–90; three + (re)peat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019