Definition of all hell breaks or is let loose in English:

all hell breaks (or is let) loose

informal Suddenly there is pandemonium: the police arrived one night and all hell broke loose
More example sentences
  • Suddenly all hell broke loose and everybody dived for cover.… It was only later that the man's story emerged.
  • Suddenly, all hell broke loose and a couple of compartments were set on fire.
  • Suddenly all hell broke loose as one of the suspects struggled free, grabbed a knife and attacked an unarmed officer.
See parent entry: hell

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Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope