Slouch
early 16th century (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 century.
wiktionary
From Middle English slugge, from Old Norse slókr(“a slouching, lazy fellow”) [1], cognate to Swedish sloka(“to wilt, slouch”).
etymonline
slouch (n.)
1510s, "lazy man," variant of slouk (1560s), probably from a Scandinavian source, perhaps Old Norse slokr "lazy fellow," and related to slack (adj.) on the notion of "sagging, drooping." Meaning "stooping of the head and shoulders" first recorded 1725. Slouch hat, made of soft material, first attested 1764.
slouch (v.)
"walk with a slouch," 1754; "have a downcast or stooped aspect," 1755; from slouch (n.). Related: Slouched; slouching (1610s as a past-participle adjective; 1660s of persons, 1690s of hats).
