Green’s Dictionary of Slang

stupid- or ugly-looking.

1925		Tamworth Herald 26 Dec. 3/6: ‘Sakes! There’s that fish-face guy rubbering us!’.
1928		‘Sapper’ Female of the Species (1961) 90: Fish-faced Lizzie.
1934		L. Berg Prison Nurse (1964) 43: He thought, what a break, after all those fish-faced dames we had as nurses.
1949		Wodehouse Mating Season 132: To the extent of making him look anything but a fish-faced gargoyle.
2002		Astrozine 🌐 By the time mighty Mars squares mystic Neptune, you’re so sick of their complaints (pots and kettles, little fish-faced miseries, pots and kettles) that you spike the coffee with drugs to anaesthetize them all.