Green’s Dictionary of Slang

ruby lips n.

[the open wound thus created before it is bound up resembles ‘ruby lips’]

(N.Z. prison) body modification whereby marbles are inserted into the penis.

Show quotations
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 157/1: ruby lips n a form of body modification whereby one or more marbles are inserted into the penis to change its surface texture.