Masticating.
I had a teacher at secondary school who would tell any chatterboxes to stop masticating.
The first time you heard it, it sounded enough like masturbating to get anybodys attention and it made me laugh.
Also, singlespeedstu +1
However, in Welsh, ‘twmffat’. Pronounced ‘tomb-fat’, it translates as funnel.
Khodomodomo is my all time favorite. It is what I get called by friends and colleagues in Lesotho. Pronounced ‘(k)hod-oo-mod-oo-mow’ it translates as ‘dinosaur’. Rather appropriate I think.