the law of the jungle
US /ðə lɔː əv ðə ˈdʒʌŋɡl/
UK /ðə lɔː əv ðə ˈdʒʌŋɡl/

1.
弱肉強食, ジャングルの法則
a situation in which only the strongest or cleverest people survive and succeed, because there are no rules or laws to protect the weak
:
•
In that cutthroat industry, it's truly the law of the jungle.
その熾烈な業界では、まさに弱肉強食だ。
•
Without proper regulations, the market became a place where the law of the jungle prevailed.
適切な規制がなければ、市場は弱肉強食がまかり通る場所となった。