Evidence that one receives or makes phone calls while on the toilet. The rim-tone is characterized by the anal shriek of seal-breaking accompanied by the splashing sounds of loaf impact and/or groans of relief - all with that peculiar reverb from a toilet stall.
I was trying to reschedule my physio appointment over the phone, but I couldn't hear the therapist over the cacophony of his rim-tones.
de Mr. T.M.I. 6 juin 2007