The friendship reciprocity ratio, or F.R. Ratio, is the ratio representing the unwritten friendship
law that the sum of x-friend's purchases for y-friend should be
equal to, or as close to
equal to, y-friend's purchases for x-friend. The closer to "0" this ratio is, the more substantial the friendship. Any friend who is significantly negative in this ratio is a shitty friend.
Dave- Dude, Greg "forgot" his wallet again. Had to pay for his lunch again. Not to mention I bought him an Audi for his
birthday last month and all I got was a misspelled "Hapie Berthday" on
Facebook today.
Nate- Greg is a shitty friend. What's your guys' friendship reciprocity ratio at now?
Dave- I think he's got our F.R. Ratio down to -$3,000,000 now.
Nate- Wow dude, what a piece of
shit.