Jahno (Jah Knows)

Rastafarians use the terms "Jah" and "Jah Jah" as a term for God and/or Haile Selassie I who is also known by the Amharic title Janhoy (literally "Your Majesty").

no is short for the word 'Know' :to perceive or understand as fact or truth; to apprehend clearly and with certainty

in other words, GOD KNOWS!