Meaning hot, an abbreviation of bunsen burner alluding to its fiery properties.

Bunse is cockney rhyming slang. Bunse = Bunsen Burner = Nice little earner.

exactly as the man says, "bunse" => "earner" => "dollar"

to the prick who didn't understand it and wanted it removed via quality control, take your head out of your fat arse and realise that English is also spoken in (amongst other places outside the US) England, where the language could arguably be said to have come from ;)

..and cockney rhyming slang is vast enough to fill this tedious website on its own. Up yours ya merchant banker.