by the seat of your pants
by the seat of (one's) pants
Without a clear plan or direction. Often used in the phrase "fly by the seat of (one's) pants." 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!
by the seat of your pantsby instinct rather than logic or knowledge. informal
This expression was first used by pilots in the mid 20th century, in the form fly by the seat of your pants , meaning ‘fly a plane by relying on human judgement rather than navigational instruments’.
1977 Martin Walker National Front Mussolini had governed by the seat of his pants, guided in part by his early Socialism, in part by his…bombastic nationalism.