Hi there, the only slang term for an ambulance that I've heard in the UK is 'meat wagon', though that is very non politically correct and therefore a bit old-fashioned, but I can imagine it being used by someone in a context where some gallows humour comes into play e.g. a very messy murder or fatal accident.
Two resources that you might find useful below. The first is a web page for a now defunct TV show called 'The Bill' explaining some of the jargon and acronyms used (think British version of Hill Street Blues, she says thus showing her age *rolls eyes*). 'The Old Bill' is itself a nickname for the police.
http://thebill.wikia.com/wiki/Police_lingo
The second covers Medical slang terms, including the dying art of insulting acronyms used by doctors to describe patients. it comes from a series of articles published in the British Medical Journal http://www.translationdirectory.com/glossaries/glossary224.php#Terms . I particularly like 'UBI' (Unexplained Beer Injury). See also 'Hasselhoff' and 'TEETH'.
Brit Speak
Two resources that you might find useful below. The first is a web page for a now defunct TV show called 'The Bill' explaining some of the jargon and acronyms used (think British version of Hill Street Blues, she says thus showing her age *rolls eyes*). 'The Old Bill' is itself a nickname for the police.
http://thebill.wikia.com/wiki/Police_lingo
The second covers Medical slang terms, including the dying art of insulting acronyms used by doctors to describe patients. it comes from a series of articles published in the British Medical Journal http://www.translationdirectory.com/glossaries/glossary224.php#Terms . I particularly like 'UBI' (Unexplained Beer Injury). See also 'Hasselhoff' and 'TEETH'.
Hope this helps.
'Gatty'