This is a word that's mostly used in the town of Brackley to signify uselesschatter. Particularly in respect to rounders/baseball.
Total rubbish.
The longest forum thread in the world is full of rounders twaffle.
or
Having stayed up late to catch this sci-fi nonsense (ie Star Wars), I can confirm this is twaffle of the highest order
twaffle of douche. ahole who doesn't know when to quit. always takes things too far. always tells storys that are way too long and not relevant in any way.