From Longman Dictionary of Contemporary Englishwitterwit‧ter /ˈwɪtə $ -ər/ (also witter on) verb [intransitive] British English informalTALK TO somebody to talk a lot in a boring way or about something unimportant SYN ramble onwitter about I’m sick of her wittering on about her boyfriend.→ See Verb table
Examples from the Corpus
witter• I can hear Mum's voice wittering in the background.• Digital mobiles witter noisily at high frequencies.• Honestly, Ethel, she sounded really mad, wittering on about beetles up her pyjama leg and suchlike.• We witter on about quality initiatives and produce myriads of little forms to show just how quality-driven we are. 