Diploid is a word that is typically used by the nerds of the 21st century. You would use the word as a name you would call someone if they made a stupid mistake or missed an answer on a test. The term originated in Laguna Middle School when a nerd noticed the term for a cell, diploid, sounded like a name you would call someone. The traditional method for "diploiding" someone is using your index finger to flick someone under the nose. This, however, proved to be too difficult and was changed to flicking someone with the nail side of your index finger anywhere on the face. The phrase commonly used for diploiding someone is, "Ya diploid, why'd ya do that?" It is supposed to be said with a very nerdy accent. "Ah, don't be such a diploid!" is also an acceptable phrase.