The first one is BFD for Big Fucking Deal. Can be used straight ("look, you idiot, of course it's a BFD!") or ironically ("yeah, right. BFD.").
The second is DDH for Drink and Drugs Hell. This is fantastically useful particularly with reference to actors ("Ray Liotta? He hasn't been in anything for ages - perhaps he had a DDH?"*)
*I'm sure he didn't, MLFs.