Well, this is really a funny one. Was just reading a book on taxation of derivative contracts. There I came to know that there exists an ice-cream flavour developed by financial markets and taken care of by law. Heard of 'plain vanilla'??? No??? Well same was by case when I heard about it for first time; "come on, you gotta be kidding" types.
But naah, they do exist. This term is in fact very popular in financial markets, used to describe a simple financial instrument (no wonder 'vanilla').
Keep looking and tell me if you find more of ice-cream in taxation. [ :) ]