Green’s Dictionary of Slang

molly (malone) n.

[rhy. sl.]

the telephone.

[UK]S.T. Kendall Up the Frog.
[UK]D. Powis Signs of Crime 193: Molly (Malone) The telephone.
[Scot]I. Welsh Dead Man’s Trousers 159: Worried aboot they Molly Malones zappin ehs faimlay.