Green’s Dictionary of Slang

(orig. Aus.) small or undeveloped female breasts.

1975		J. Roe The Same Old Grind 66: She shook her empty breasts. ‘Hey! Flapjacks!’ ‘Beagle ears!’ ‘Fried eggs!’.
1984		P. Barker Blow Your House Down 2: She’s got nowt there to sag [...] Pair of fried eggs!
1985		‘Jennifer Blowdryer’ Modern English 77: tits (n): Fried Eggs.
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: fried eggs n. Small breasts. As in: ‘Do you fancy that Kate Moss?’ ‘Naaaah! Tits like fried eggs.’.