Big Friendly Giant

fearsome, fabulous, famed, facist, facetious, fake, fearless, faithful, fatherless, fast, fashionable... so many ways to go with that

THEY SHOULD HAVE INCLUDED WHAT IT MEANT IN THE TRAILER. MY CHILDHOOD

big fucking gun

I saw the trailer and immediately thought big fucking giant

No really, BFG is commonly associated with Doom. It's either a really cool or really unfortunate title for a film.