Nececelery Share definition Flag Absolutely positivly having to have celery. When, for some unknown reason, you have to have celery. I made a salad the other day, and it just wasn't right. The situation was nececelery. Nececelery by Trent Kuver February 26, 2009 0 0 Get merch Get the Nececelery mug. Buy Now — $32.95 See more merch