Gross out is a game where one person must wear a blindfold while all the other guests make and mix a whole bunch of foods together without the person who is blind folded knowing what the food is and what's in it.
He/she must eat/drink all of it without vomiting.
It's honestly your decision how gross you want the food/drink to be so good luck.
P.s I have played this many times before, haven't barfed once! Its usually funnier when you put on a funny song while you watch the person drink/eat the food/drink and watch the reaction.
Trust me you'll LOVE this game haha :) !!!