The term originated in Iloilo City, Philippines. It means using the funds of one candidate to benefit their rival canditates. Turning one's own political contributions against oneself by deception and giving the contributed funds to a rival candidate(s). A double whammy.
Jessa: I had sex with a cab driver, alright? It's called being free.
Blerta: You are prostitute?
Jessa: No, it's not prostitution if you don't get paid.
Blerta: You are UNPAID prostitute?!? You are lower than dog!