Green’s Dictionary of Slang

absolutely excellent.

1810		‘Jonny Raw and Polly Clark’ in Batchelar’s Jovial Fellows Collection of Songs 4: A swigging gin we’ll spend our time, / Agreed, said she, that’s bang up prime.
1811		Lex. Balatronicum n.p.: To bang up prime: to bring your horses up in a dashing or fine style: as the swell’s rattler and prads are bang up prime; the gentleman sports an elegant carriage and fine horses.
1825		‘Jerry Blossom’ in Universal Songster I 21/2: For they tell’d ma as hoo shoo was bang up and primed.