Generational argument help

Over the years certain words and phrases have lost their original meanings and come to be understood in a whole new context.
Gay is the primary example of this.
Care free and happy is now a term to describe an individuals sexual orientation.
Others words have a geographical context.
Fanny here in the UK is a slang term for the vagina, while in the US it's a persons buttocks.
Pants in the UK are underwear, while in the US they are trousers.
Now in my household an argument rages and it surrounds the acronym F.T.W.
To me that has, and always will be, Fuck The World, but my son is firm that it means For The Win.
Now while I will quite happily agree that in modern times it is used as For The Win, and is often easily recognised as that within the context that it is used, I will not back down in claiming that originally it was, and can still be used as, Fuck The World.
My son considers that it has never been fuck the world and I'm a doddering old fool who is displaying symptoms of alzheimers and tourettes.
To clarify our positions.
Mines is that if I seen 'The Dwarves FTW' spray painted on a wall then I would presume that it's fuck the world, while if it was say the name of a football team followed by FTW in the lead up to a cup final I would expect it to be for the win.
His position is that both would mean for the win.
Now I know I'm right, but some validation from others would be nice.
So was it fuck the world, and occasionally still used as such?
Or has it always been simply 'for the win' and nothing else?
Oh. this could be interesting.