To grok something means “to understand it completely.” The word grok comes from a language spoken on the planet Mars—well, at least according to the science fiction writer who coined the term! Also, we know the meaning of the word...
The adjective corny describes someone or something “unsophisticated” or “naive.” This sense of corny goes back at least as far as the 1920s. Seed catalogs of the time often contained bits of goofy jokes and broad humor...