balls on about (something)

rude slang To speak continuously or at great length about something in a foolish, nonsensical, or irritating manner. Primarily heard in UK. Tom is always ballsing on about his plans of becoming some great author, but he never writes a blooming thing! What on earth are you ballsing on about? You really have no idea how politics works, do you? He used to be a college professor, so he can balls on about any topic for hours on end.