The phrase "big heist" refers to a major and carefully planned robbery of something valuable, typically involving a large sum of money or valuable items. Full definition
The film features the same big heist set - up as its predecessors, albeit with a brand new cast. (iheartthetalkies.com)
Just this week a man, armed with a handgun, attempted to rob what is almost certainly (based on local accounts and a little detective work on our part) the very same Dedham, Massachusetts, bank that was the setting of the first big heist in 1973's... (criterion.com)
Synopsis: Master criminal Neil McCauley (Robert De Niro) is trying to control the rogue actions of one of his men, while also planning one last big heist before retiring. (mrqe.com)