Spell out, in Morse Code, "S.O.S." by flaring your nostrils.
Take a wrapped candy bar, and pretend to be a lecturing biology professor, describing in great detail the step-by-step dissection of the "confectionus - reesus - peanutbutterus". ( peel away the outer layer, describe everything in anatomical terms. Rubber gloves will help immensely! Once you have reached the center, GRAB IT AND EAT IT!) EEEEEwwwww!
Brag Loudly about something you have never done. Example: " Not many People know it, but I actually built the Taj Mahal by myself, over a period of twenty years! I went back in time, you see, and drank a magical elixir to lengthen my life and give me super powers . . .etc.
Take a mouth-full of water. The player to your left must do the same. Now hold a stare contest with that player. Don't laugh! You'll soak the Board and yourself!