800-pound gorilla

noun \ ˈāt-ˈhən-drəd-ˈpau̇nd- , -dərd- \

Definition of 800-pound gorilla

: one that is dominating or uncontrollable because of great size or power
  • like it or not, the 800-pound gorilla usually sets the standard
  • —Daya Nadamuni

First Known Use of 800-pound gorilla

1976

in the meaning defined above

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