Noun
Used other than figuratively or idiomatically: see big, boy.
(idiomatic) A large object or person.
I've been dying to get behind the wheel of this big boy.
(idiomatic, informal) An adult male, considered to be sufficiently mature and independent.
He is a big boy and can take care of himself.
But I don't want to lose touch with things like eating in Bob's Big Boy. Drew Carey
Looks like I'm going to ruin your day, Big Boy. I choose to live my crappy life a little longer. (Susan) Sherrilyn Kenyon
When I was going for my graduate degree, I decided I was going to make a feature film as my thesis. That's what I was famous for-that I had my thesis film be a feature film, which was 'You're a Big Boy Now.' Francis Ford Coppola
I went to school, but they didn't give you too much schooling because just as soon as you was big enough, you get to working in the fields. I guess I was a big boy for my age. Muddy Waters
I'm a big boy now, and I have to deliver. Ang Lee
Definitely, as I get older and my taste buds change, I want to do different things. I'm not ready for directing yet, you know, maybe when I get my big boy voice; I don't have that yet, but right now definitely producing for sure. Michael B. Jordan