"Triple overtime" means that a game or competition has gone on for three additional periods after the regular time has ended, usually due to a tied score. Full definition
The other time the eventual national champ lost in triple overtime. (sbnation.com)
Darcy was the coach of the local Saskatchewan Junior Hockey League team, and his Humboldt Broncos trailed 3 — 1 in a playoff series, after losing a heartbreaker in triple overtime at home less than 24 hours earlier. (si.com)
«Our starting center goes down, Haley plays only 24 minutes and we go into triple overtime against a heavy hitter like Pinewood. (sportstarsmag.com)