wing it

(verb) to do something without any preparation

Example Sentences:

The confident student didn’t prepare for his presentation. Instead, he decided to just wing it.

A: Are you going to do some research before you travel to Asia?
B: No, I’m planning on winging it. When I arrive I’ll try and find a good place to go.

The shareholders were impressed when the CEO winged his entire speech.

Media:

Similar idioms:

1. play it by ear