slouch

Concise Oxford English Dictionary © 2008 Oxford University Press:
slouch/slaʊtʃ/

▶verb

• 1 stand, move, or sit in a lazy, drooping way.

• 2 dated bend one side of the brim of (a hat) downwards.

▶noun

• 1 a lazy, drooping posture or movement.

• 2 [usu. with neg.] informal an incompetent person: he was no slouch at making a buck.

• 3 a downward bend of a hat brim.

– derivatives
slouchy adjective.

– origin C16 (in the sense ‘lazy, slovenly person’): of unknown origin.