The phrase "big gorilla" is often used to describe someone or something that is very powerful, influential, or dominant. It can suggest that the person or thing has a strong presence or is in a position of authority. Full definition
«Amazon is the other big gorilla on our doorstep,» Mr Goyder told a Sydney business lunch hosted by the American Chamber of Commerce in Australia. (afr.com)
It is a unique situation though, where the usual big gorilla on the block, corporate America is a no - show. (feedspot.com)
Sadly for the rest of the population, Rampage comes across as a brain - dead popcorn flick, where producers leave the script at the door and just have a big gorilla smash up a city. (oracleoffilm.com)