To stand, move, or sit in a lazy, drooping way with poor posture.
Origin uncertain, possibly from Old Norse 'slokr' meaning 'slouching fellow' or related to 'slough'. The word appeared in English in the 16th century, initially describing a person's dejected appearance before extending to posture.
Slouching was once considered not just poor etiquette but a moral failing, reflecting laziness or lack of character. The phrase 'no slouch' meaning 'quite good at something' creates an interesting contradiction - it suggests that avoiding slouching requires skill and effort.
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