Green’s Dictionary of Slang

beneship adj.

excellent, very good.

c.1566		Harman Caveat for Common Cursetours in Viles & Furnivall (1907) 86: This bouse is as benshyp as rome bouse This drinke is as good as wyne.
1592		Groundworke of Conny-catching A3: Yonder dwelleth a quier cuffen it were beneshp to mill him.
1608		Dekker Belman of London (3rd) J4: Bowse there a board & thou shalt haue benship.
1612		Dekker Canting Song O per se O O1: I met a Dell, I viewed her well, / she was benship to my watch.
1665		Head Eng. Rogue I 45: [as cit. 1612].
a.1674		‘Canting Song’ Head Canting Academy (1674) 22: [as cit. 1612].
1688		R. Holme Academy of Armory Ch. iii item 68c: Canting Terms used by Beggars, Vagabonds, Cheaters, Cripples and Bedlams. [...] Beneship, very good fellowship.
c.1698		B.E. Dict. Canting Crew.
1707		J. Shirley Triumph of Wit 196: I met a Dell, I view’d her well, she was benship to my watch.
1719		A. Smith Lives of Most Notorious Highway-men, etc. (1926) 202: Bene-Ship, very good, also Worship.
1725		New Canting Dict.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict.

In derivatives

beneshiply (adv.) (also beenly)

1. excellently.

1612		Dekker Canting Song O per se O O1: This Doxie Dell, can cut bien whids, and wap well for a win And Prig and cloy so benshiply all the Deusea-vile within.
1665		Head Eng. Rogue I 47: Benshiply, very well.
a.1674		‘Canting Song’ Head Canting Academy (1674) 22: [as cit. 1612].
1754		A. Hamilton Tuesday Club in Micklus (1995) Bk XII 278: She tipd me the Gum very Cleanly, [...] The Brimston, she wheedled so beenly.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.

2. worshipfully.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.