Jahbulon (or Jabulon) is a word which was used historically in some rituals of Royal Arch Masonry. According to Francis X. King, it is also used in Ordo Templi Orientis rituals.
There has been much debate over the origin and meaning of this word. There is no consensus even among Masonic researchers as to its meaning or legitimacy: one Masonic scholar alleges that the word first appeared in an early 18th Century Royal Arch ritual as the name of an allegorical explorer searching for the ruins of King Solomon's Temple; another Masonic scholar believes it is a descriptive name for God in Hebrew; The most common masonic explanation is that it is a word derived from combining parts of the name of God in different historic languages.
Non-Masonic authors, especially those with an anti-masonic attitude, have alleged that it is a Masonic name for God, and even the name of a unique "Masonic God", despite repeated statements by Freemasonry's officials that "There is no separate Masonic God", nor a separate proper name for a deity in any branch of Freemasonry. It is this interpretation of a "Masonic God" that has led to debates about and condemnation of Freemasonry by several religious groups. In England, no ritual containing the name has been in official Masonic use since February 1989.
Read more about Jahbulon: Examples of Interpretations of The Word Based On Its Syllables, Criticisms of The Word and Its Uses