'Fly by the seat of your pants' is parlance from the early days of aviation. The term emerged in the 1930s and was first widely used in reports of Douglas Corrigan's flight from the USA to Ireland in 1938.

He didn't openly admit it but it was widely assumed that he had ignored the rejection of his flight plan and deliberately flown east rather than west. I believe the full phrase started as flying by the seat of your pants and it comes from the aviation community. I know my parents think that I'm just flying by the seat of my pants ever since I dropped out of college, but I just signed with a record label and am launching my singing career! His subsequent 29 hour flight ended in Dublin, Ireland. https://idioms.thefreedictionary.com/by+the+seat+of+my+pants, Without a clear plan or direction. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. No, I just conducted the overture by the seat of my pants.”, Asked at the MCA Pub Conference last year whether the group's pricing is scientific, chairman Tim Martin said: "No, it's not - I just fly, She said: "I am operating on a shoestring and I'm flying, I'm no fashion renegade, I don't fly through life, Well, "something came up" and they didn't show up, so I was stuck with teaching it, trying to fly, I have been looking through an advanced copy of this year's offering -, I was drawn instead to the artists who at the time seemed to represent a counterformalism for which I coined the term "post-Minimalism," a bit of journalistic legerdemain that briefly passed for a catchphrase, upon which I sailed. The term comes from World War II, when aviators used it to describe flying when instruments did not work or visibility was poor.

He ran the business by the seat of his pants. seat of one's/the pants, by the Using experience, guesswork, or instinct rather than some calculated or scientific method. Definition of fly by the seat of (one's) pants in the Idioms Dictionary. Therefore, people were flying by the seat of their pants or flying without the ability to communicate or fully plan things out. If you do something by the seat of your pants, you do it using only your own experience and…. After the war it quickly came into more general use, as in “Use a score? It comes from the sensation of position and movement transmitted to a person's body through the main contact to a fast-moving vehicle. Learn more. He ran the business by the seat of his pants. I got through school by the seat of my pants. Pilots who are in fog and using only instruments are flying by the seat of their pants.

It involves heightened awareness, bought on by adrenaline, where all relative information seems to pass through one's buttocks in preparation for evacuating them.