moose knuckles`
n.— «Always been partial to “Moose Knuckles.” » —“Re: Names For -==[Pussy]==-” by Mike Bartmanovich Usenet: alt.tasteless.jokes May 27, 1996. (source: Double-Tongued Dictionary)
Further reading
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...