has been fooled by a glitch in the system that for some reason lists my location as France when I am a True Brit and proud of it and if he EVER suggests that I am French again there will be bloodshed....
Needs to pay attention while I explain that it is on old expression meaning one is talking nonsense or, to explain it in modern vernacular, talking crap. The implication being that the words or either worthless or grossly incorrect and therefore are being spoken through the orifice from which faeces or wind are usually emitted.