Various recommendations that have come to me via email.
Dear BLOGGER checker, I am a REAL PERSON, see one of the drafts where I have given you my phone number to reach me.
"[German, probably from dialectal, term of abuse : obsolete Pumper, breaking wind (from dialectal pumpern, to break wind, from Middle High German, to knock, frequentative of pumpen, of imitative origin) + German Nickel, goblin; see nickel.]"