CPFR
An acronym for Cost Per Fuck Ratio. CPFR is calculated by deviding the amount of money you have spent to get lucky by the number of times you actually got lucky with a given person.
English James: How are things with Fiona?
Bobby: Great! I bought some ice cream for 7 bucks and got laid twice so my CPFR is only $3.50!
Bobby: Great! I bought some ice cream for 7 bucks and got laid twice so my CPFR is only $3.50!