"Facebook Inflation Ratio/Rate" it can be used to describe someone when comparing what they look like in person to what they look like in there facebook profile pictures. Have you noticed on the internet people usually have good looking pictures? Well thats where this word comes in. see examples
Adam-"Mary is pretty cute, shes probly like an 6 outta 10 dude"
Ced- "Alright well lemme check her out on facebook...well based on her FIR, id say shes about a 7 or 8"