A combination of the words entrepreneur and tampon, this term is used to describe a wealthy woman who uses hundred dollar bills (or benjamins) as tampons. While the absorbency of said benjamins is in question, at least it's a safe place to keep your money.
Clarence, a confident young tampontrepreneur, decided to reach into her snatch and pay the bartender with a bloody hundred dollar bill.
A now widely understood cultural reference used to describe the initially private phone conversation that became suddenly widely public and therefore humiliating between Charles and Camilla sometime around 1993 when he became wistful and horny and confided to her that he wished he could be a tampon so he might spend lengthy stints of time being inside of her.
Tampongate is definitely both a hilarious and squirm-inducing moment in Britishhistory that nobody who was at least ten at the time is likely to forget.