Green’s Dictionary of Slang

attractive, pretty.

1961		Sun. Tel. 19 Mar. 9/1: He encountered the dishy St. Tropezienne on his holiday plane.
1974		J. Lahr Hot to Trot 37: ‘These dishy boys with bangs and collarless Pierre Cardin suits.’ ‘You mean the Beatles.’.
1985		S. Berkoff West in Decadence and Other Plays (1985) 119: We had something really dishy lined up for you.
1991		Reeves & Mortimer Vic Reeves Big Night Out n.p.: Now I’m dishy.
2000		Indep. on Sun. Culture 13 Feb. 1: A dishy leading man.
2017		V. McDermid Insidious Intent (2018) 163: ‘I’m off on a second date with El’s dishy friend Mark’.