1. Friggatriskaidekaphobia is the fear of the number 13. Happy Friday the 13th!
2. The letter J does not appear anywhere on the periodic table of elements.
3. Andy Warhol created the Rolling Stones' emblem depicting the big tongue. If first appeared on the cover of the "Sticky Fingers" album.
4. Groaking is watching people eating in the hope that they will offer you some.