An aracane adjective used as an expletive in the earliest issues of Mad magazine (e.g. 1950's) - comparable to "garshdarned" (see examples). However, maybe it's true that it was also used to mean 'asshat' later on, as claimed above.) Possibly a parody of some German or Yiddish word, I suspect. Correct spelling may actually be 'furshluggenner'.

The Nussy, or the “nose pussy”, if you will, was discovered during the corona virus pandemic of 2020. People that had to be tested for Covid-19 had to have their nose swabbed right where the brain connects, which often led to people rolling back their eyes and gagging.

A nose-swab-fetish developed from this, because we, as humans, ruin everything.

Word used by Mad Magazine during the 1970's. Means asshat.