When something happens that's basically annoying, but it goes beyond this..especially applies to when something unintentional or unusual happens. Also Related to Thinining.
Someone goes to work and its been cancelled; Thats extremely fattening.
"I've just dropped my new torch, that's Fat".
The quality in food that will potentially make someone fatter. A high content of fats, calories, etc.
That butter cake is extremely fattening.