big-boy pants

big-boy pants

slang The ability to behave as a mature adult man should. The phrase is typically used perjoratively to imply that one is not behaving in such a way. Come on, Larry, you need to put on your big-boy pants and own up to your lies. I know you're not a morning person, but put on your big-boy pants and go to work.
See also: pant
References in periodicals archive ?
He's had to put his big-boy pants on and get physical and do his best.
But if you hope to consistently put yourself inside bow range of mature whitetail bucks, you'd better have your big-boy pants cinched up tight.
They have to put on their big-boy pants and big-girl pants," Somerhalder said, while Dobrev added, "The problem is they keep taking their pants off and that keeps getting in the way of things.
A CHC representative added: "At some point, we have to put our big-boy pants on and say either, 'We believe', either what I am telling you is the truth, and I'm willing to sit in the front and risk my family and everything that I have got.
A pilot from CHC Helicopter said: "At some point we have to put our big-boy pants on.
I showered, shaved, put on a pair of big-boy pants, and hit the town like it had never been hit before.