It is a Rastafarian expression, and can be as simple as meaning "we" or "our", or can take on a more theological meaning.https://www.urbandictionary.com/define.php?term=I%20and%20Ihttps://en.wikipedia.org/wiki/Iyaric
"I and I (also spelled I&I, InI, or Ihi yahnh Ihi) is a complex term, referring to the oneness of Jah (God) and every human. In the words of Rastafari scholar E. E. Cashmore: "I and I is an expression to totalize the concept of oneness. 'I and I' as being the oneness of two persons. So God is within all of us and we're one people in fact. I and I means that God is within all men. The bond of Ras Tafari is the bond of God, of man." The term is often used in place of "you and I" or "we" among Rastafari, implying that both persons are united under the love of Jah. Also in the Twi language (in which patois uses a lot of Twi loan words) of Ghana, Me ne me is also said, which literally translate to "I and I"."