What does this phrase mean?
Sea-Confection-4278
I saw an ambulance in Melbourne helping a poor guy who had been hit by a taxi, and I noticed a phrase painted on its window. It said, "patient's own stingos applied," but I’m confused about the meaning. When I googled "stingo," it said it’s British slang for beer, which doesn’t seem to fit. Could it be slang for medicine used to treat bug bites because of the word "sting"?
Thanks in advance!