What it means
To wing it is to dive in with barely any prep and trust your nerve, your mouth, and a bit of chaos to carry you through. You say it when someone hasn't planned properly but goes for it anyway, hoping confidence can patch the holes before anyone notices.
Usage examples
"You done the deck for the client pitch? Not a chance, mate. I’ll wing it, chat rubbish confidently, then blame the projector if it goes sideways."
"I had no time to prepare for the meeting, so I just winged it and hoped for the best."
"We have no recipe, we will wing it and see how the cake turns out."
"Didn't revise a single slide, so I just winged it in the meeting and prayed nobody asked for numbers."
"We're missing half the ingredients, but sod it, let's wing it and call it rustic if it tastes weird."
Where it comes from
This one really does come from old theatre talk. Back in the 1800s, if an actor had to learn a part fast, they might study it while standing in the wings at the side of the stage, then go on and bluff their way through. That scrappy improv energy is what gave us wing it.