slouch

Từ điển Oxford Advanced Learner 8th

slouch [slouch slouches slouched slouching] verb, noun BrE [slaʊtʃ] NAmE [slaʊtʃ]
verb intransitive (+ adv./prep.)
to stand, sit or move in a lazy way, often with your shoulders and head bent forward
•Several students were slouching against the wall.
•Sit up straight. Don't slouch.
•He slouched across the room and collapsed in a chair.
Verb forms:

Word Origin:
early 16th cent. (in the sense ‘lazy, slovenly person’): of unknown origin. Slouching was used to mean ‘hanging down, drooping’ (specifically describing a hat with a brim hanging over the face), and ‘having an awkward posture’ from the 17th cent.
Idiom: ↑no slouch
 
noun usually singular
a way of standing or sitting in which your shoulders are not straight, so that you look tired or lazy

Word Origin:
early 16th cent. (in the sense ‘lazy, slovenly person’): of unknown origin. Slouching was used to mean ‘hanging down, drooping’ (specifically describing a hat with a brim hanging over the face), and ‘having an awkward posture’ from the 17th cent.