mr. cedrone Share definition Flag A very difficult, frustrating teacher who is full of himself. Also there is a disease called Cedronephobia. OMGOSH. That teacher is a Mr. Cedrone.I have caught the Cedronephobia! mr. cedrone by squarerootof69 May 16, 2014 0 0 Get merch Get the mr. cedrone mug. Buy Now — $32.95 See more merch