There are other notations such as R and L (right and left). Adding a lover case I (i) after each notation means it is the inverted notation (opposite).
A common term used in the state of UTAH.
It's still uncertain if this term came from the Urban Language OR from the Mormons in Utah.
Because we all know... That the URBAN MOUTH could care less about: What is said!! -OR- Who hears it!!