Financial Winner, a term used when you've managed to make a saving on something, or better still got something for free.
I'm going to London on the weekend, train costs £7.50, but I can go by Megabus for £1.00 FW!!
I'm off to the gym for a shower, rather than using my own hot water, FW!!
Sorry it's cold in here, haven't had the heating on in years, FW!!