Definitions for "Slouch"
Keywords:  droop, clownish, hat, hang, ungainly
A hanging down of the head; a drooping attitude; a limp appearance; an ungainly, clownish gait; a sidewise depression or hanging down, as of a hat brim.
An awkward, heavy, clownish fellow.
To droop, as the head.
Keywords:  lazy, incompetent, walk, loll, slovenly
To walk in a clumsy, lazy manner.
It seems unnecessarily cruel to use this term for "excessive relaxation of body muscles" to describe a lazy or incompetent person. See: LOLL.
an incompetent person; usually used in negative constructions; "he's no slouch when it comes to baseball"
Keywords:  seat, angle, vertical, back
Angle of a seat back, from vertical.