expression
standing for a long time; on one's feet for ages
Describes the state of remaining standing without sitting down, often with a nuance of hardship or endurance. Commonly used with verbs like する or after a duration.
電車で一時間も立ちっぱなしだった。
I was standing for a whole hour on the train.
立ちっぱなしの仕事は足が疲れる。
A job where you're on your feet all day makes your legs tired.