rate tart
English
Etymology
rate + tart i.e., rate, as in "rate of interest", and tart, UK slang for a prostitute, referring to the promiscuity (in the sense of indiscriminate choice) of such a person.
Noun
rate tart (plural rate tarts)
- (British, informal, somewhat derogatory) A holder of a credit card or bank account who frequently and intentionally changes providers to take advantage of an offer of a low interest rate established to attract new customers.