SP3 Redux?

[Imp]

Scotish to English would be handy a guy I know is hard to understand especially after a few beers. I assume because the accent becomes worse & more slang though it is possible he could just be pissed & talking nonsense. On that point actually how is it 2 pissed people can understand each other yet a sober person can't despite the fact he should be more capable of figuring it out. The only way I know to join the conversation is to catch up.