Green’s Dictionary of Slang

1. a pretty young woman, a word esp. popular with the tabloid press, seaside entertainers etc, also as term of address.

[1694		J. Crowne Married Beau Drammatis Personae: Mr. Lovely. A new Married Beau [...] believes himself very Handsome].
[1765		H. Brooke Fool of Quality I 37: Beside him sat Miss Lovely].
[1805		J. Reynolds Blind Bargain I iii: He has just decoy’d away a young lovely].
1934		F. Tuohy Inside Dope 104: Modern lovelies and their queer escorts smoking opium off Juan-les-Pins.
1938		J.B. Booth Sporting Times 119: Arthur Collins [...] always maintained that the loveliest of all the ‘lovelies’ — to use the detestable slang of the day — was Belle Bilton.
1943		R. Chandler Lady in the Lake (1952) 6: At a flt desk in line with the doors was a tall, lean, dark-haired lovely.
1944		Observer 11 June 2: The jealous and possessive mother who sets out on the old, old trail of preventing her son’s marriage to a young ‘lovely’.
1951		Kerouac On the Road (The Orig. Scroll) (2007) 217: Dig her [...] that little gone black lovely.
1956		J. Osborne Look Back in Anger Act II: Good-bye, lovely.
1959		A. Sinclair My Friend Judas (1963) 114: On his arm was a long streak of lank lovely, obviously lapping him up.
1966		T. Keyes All Night Stand 57: Take a look at how the other two were getting on with their lovelies.
1975		‘P.B. Yuill’ Hazell and the Three-card Trick (1977) 115: The lovely who elected herself Miss Right for the night.
1980		(con. 1940s) O. Manning Sum of Things 446: Near them lay one of the young women known to officers as ‘Gezira lovelies’.
1985		R.G. Barrett You Wouldn’t Be Dead for Quids (1989) 143: ‘Where’d you find the two lovelies?’ ‘Escort agency’.
1998		I. Welsh Filth 281: She’s a lovely, awright. Whoah-ho-ho!
2005		J. Stahl I, Fatty 17: He married a church-going lovely.
2015		J. Stahl OG Dad 13: The beehived lovely in charge of our application raised her eyes.

2. (US drugs, also lovelies, lovely high) marijuana laced with phencyclidine.

1978		Peterson & Stillman Phencyclidine Abuse 120: [Names for Phencyclidine] Lovely, Lovely High [HDAS].
1985		T.R. Houser Central Sl. 34: lovely Marijuana saturated with P.C.P.
2000		W. Shaw Westsiders 366: He’d just lie bed all day, smoking ‘lovelies’ [...] A lovely is sherm and weed mixed together, so-called because it makes you feel lovely.
2001		ONDCP Street Terms 14: Lovely — PCP.
2003		Microgram Bulletin XXXVI:8 182: PCP combined with marijuana is referred to as Killer Joints, Super Grass, Fry, Lovelies, Wets, and Waters.