Green’s Dictionary of Slang

shepherd’s pie n.2

[a play on N.Z. suffragist Kate Sheppard (1848-1934), who has been featured on the note since 1991]

(N.Z. prison) a $10 note.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 164/1: shepherd’s pie n. a $10 note.