In Ricky Gervais Show, Monkey News section, Karl was talking about a monkey which
... sat on a bridge and wanted stuff off people to walk over the bridge.
From the context especially with the demanding face of the monkey in the cartoon, I can assume the monkey was asking people to give him things because apparently it was honding an upper hand and people had no choice but to do so, although I seem to fail to back it up in a reliable source.
Considering the fact that Karl is from Manchester, could it be regional English, or am I totally wrong and want off simply mean want from, in that case I'd be happy to know the difference in meaning.