Note to Romeo and Juliet, 2.4.44-45: "French slop"

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Act 2, Scene 4, line 44.

French slop: loose breeches. Slops were the height of fashion in Shakespeare's time. Mercutio is calling Romeo "fancy [prissy] pants."
Sir Walter Raleigh in trunk hose, and his son in loose slops, 1602 Source:
Wikipedia