"He doesn’t buy peanuts when he goes to the circus. He calls them monkeynuts, and to eat them publicly is infra dig."
I never heard "monkeynuts". I remember seeing UK use of "groundnuts" for peanuts shortly after WWII. The Labor
Party wasted a lot of money trying to grow them on a large
scale in North Africa. I remember a movie in which this was
called a "ghastly failure".The proponents had made no study
of the soil and weather required to raise groundnuts.