kreeton Share definition Flag A bastardization of the word "cretin" which refers to one of low mental capabilities or one who is mentally retarded. Simply put, a retard. Guy 1 - You're a cretin. Guy 2 - WTF is a cretin? kreeton by finalcaliber October 18, 2004 0 0 Get merch Get the kreeton mug. Buy Now — $32.95 See more merch