Green’s Dictionary of Slang

mutton-pies n.

[rhy. sl.]

the eyes.

[UK]Referee 7 Nov. in DSUE (1984).
[UK]G.R. Sims ‘Tottie’ Dagonet Ditties 126: Bright as angels from the skies / Were her dark blue ‘mutton pies’.
[US]Wentworth & Flexner DAS.