Green’s Dictionary of Slang

a young fop.

1684		J. Lacy Sir Hercules Buffoon II ii: A fop is the fruit of a foplin, as a Wit is the kernel of a witlin.
c.1698		B.E. Dict. Canting Crew n.p.: Fop, Foppish one that is singular or affected in Dress, Gestures, &c. [...] Foplin the same, only younger.
1706		Rare and Good News for Wives in City and Country 4: Yet this Sr. Fopling must be entertain’d.
1782		G. Parker Humorous Sketches 45: No fopling he, for soon with accent rude, / Approach’d the man, and blush’d not to intrude.
1831		Exeter & Plymouth Gaz. 5 Feb. 4/4: This one is a mere fopling; the other is a man of real fashion.
1838		Crim.-Con. Gaz. 22 Sept. 35/2: The elegant Caroline, sick of foplings, and satiated with luxuries, reclined listlessly on her fauteuil.
c.1850		Peeping Tom (London) 45 180/2: [T]he elegant Caroline, sick of foplings and satiated with luxuries.