A person holding the tenets of nommunism, in that they are stationed at various open houses, parties, and many other places that have free food, and they prevent anybody from taking more than a standard serving of food so as to "deestreebute the food to everybody."
Josh: Dude we're the first to arrive at the school's open house!! Let's take a crapload of cookies!
Al: Good plan bro! *reaches for cookies*
Nommunist (in this case, a teacher): *slaps Al's hand* THERE MUST BE ENOUGH FOR EVERYBODY