Fly by the seat of your pants
/flaɪ baɪ ðə siːt əv jɔː pænts/informalUK · US
What does “Fly by the seat of your pants” mean?
Fly by the seat of your pants means to act on instinct without a detailed plan
If the recipe disappears halfway through cooking, you may have to fly by the seat of your pants. You work out each step as you reach it.
The phrase does not guarantee success. It can describe a capable improviser or someone taking an avoidable risk.
When do people say it?
Use it for improvising as events unfold. It may praise quick thinking or criticise a lack of preparation.
“With no recipe, I was flying by the seat of my pants in the kitchen.”
Is it formal or informal?
Register: informal. It is most at home in everyday conversation rather than formal writing. Most common in UK and US.
Where does it come from?
The phrase uses the image of a pilot relying on bodily sensation rather than instruments. Outside flying, it describes trusting instinct as you go.
Origin confidence: Disputed; treat with caution
How do you say “Fly by the seat of your pants” in other languages?
Last updated 2026-10-01