(UK, Australia) A rudimentary child's cart; a soapbox car.
1954 December, Rotary Reporter: Brief Items on Club Activities around the World, The Rotarian, [http://books.google.com.au/books?id=bkAEAAAAMBAJ&pg=PA38&dq=%22billy+cart|carts%22+-intitle:%22billy%22+-inauthor:%22billy%22&hl=en&ei=vSTmTu…
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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