dave:  what you're girlfriend like? sam:  well she's certainly no cheap slut, with a cpi of 120 quid i may as well get a hooker
the cost per insertion, referring to the price required in order to complete intercourse with someone of the opposite sex
"dave:  what you're girlfriend like? sam:  well she's certainly no cheap slut, with a cpi of 120 quid i may as well get a hooker" What is the definition of "cpi"?