The phrase 'hamhobbles in a knobbywocket' is British, and it's mainly said in an INCREDIBLY high-pitched crappy British accent. It's usually said like the phrase 'don't get your panties in a bunch', except British-ized. It could mean anything.
a) Argh, i'm in a scuzz, cheerio mate!
Righto, don't get your hamhobbles in a knobbywocket.
b)Hey, what's up?
DON'T GET YOUR HAMHOBBLES IN A KNOBBYWOCKET.
c) I'm pregnant.
Well, hamhobble my fucking knobbywockets!