The minutes added at the end of each half to compensate for stoppages (injuries, substitutions, time-wasting, VAR checks). Also called stoppage time, injury time, or Fergie Time if you're a rival fan who remembers Manchester United scoring winners in the 93rd minute with suspicious regularity. The fourth official holds up a board showing the minimum time to be added.
"Six minutes added on. The away team is time-wasting like their lives depend on it."