尻しりを上あげる

expression, ichidan verb

stand up; get up

Literally 'raise one's buttocks'; used when someone rises from a seated position, often implying a sudden or noticeable movement.

• 彼かれは椅い子すから尻しりを上あげて立たち上あがった。

  He raised his butt from the chair and stood up.

expression, ichidan verb

leave; depart

Figurative use: to get up and leave a place, often with a nuance of quitting or walking away from a situation.

• 彼かれは何なにも言いわずに尻しりを上あげて出でて行いった。

  He got up and left without saying a word.