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Jyutping sat1 zeon2
Pinyin shī zhǔn

Definitions (粵典–words.hk)
  1. 動詞
    冇​發揮​到​應​有​嘅​水​準​,​通常​用​喺​比​賽
    Didn't perform as good as the team/the individual usually do (usually used on describing a game)
    • 嗰隊球隊喺今場比賽中失準,輸咗畀對手
      𠮶队球队喺今场比赛中失准,输咗畀对手
      go2 deoi6 kau4 deoi1 hai2 gam1 coeng4 bei2 coi3 zung1 sat1 zeon2, syu1 zo2 bei2 deoi3 sau2
      The sports team didn't perform as good as they usually do, so they lost it to their opponent this time.
Definitions (Wiktionary)
  1. verb, of an instrument etc.
    to lose its accuracy; to be no longer accurate
  2. verb
    to fail to show one's actual level

失準 [-准]

Jyutping
Pinyin shī zhǔn

Definitions (CC-CEDICT)
  1. not up to scratch
  2. subpar
  3. off
  4. gone awry
  5. (of an instrument) to be out of kilter
  6. (of a forecast) to be off the mark
Examples (粵典–words.hk)
  1. Cantonese
    𠮶队球队喺今场比赛中失准,输咗畀对手
    嗰隊球隊喺今場比賽中失準,輸咗畀對手
    go2 deoi6 kau4 deoi1 hai2 gam1 coeng4 bei2 coi3 zung1 sat1 zeon2, syu1 zo2 bei2 deoi3 sau2
    • The sports team didn't perform as good as they usually do, so they lost it to their opponent this time.