- FM stands for Frank Murphy and AM stands for Ante Meridian, which is interesting, unless of course you don't speak Latin, and if that's the case, Ante Meridian means before noon, which is when the show is on and it's no small coincidence that FM could also stand for Frequency Modulation and AM could also stand for Amplitude Modulation, which are two very (and I mean very) popular means of ...www.fmintheam.com