Definition
To perform or speak without prior preparation.
临场发挥
He had no rehearsal, so he had to wing it on stage.
他没有排练，所以不得不在舞台上即兴发挥。
Due to the time crunch, I had to wing the speech, without time to prepare a script.
由于时间紧迫，我不得不即席演讲，没有时间准备脚本。
They didn't plan their itinerary in advance, deciding to wing it as they go.
他们没有提前计划行程，决定边走边看。