spam can
noun
1
a Southern Region 4–6–2 passenger locomotive of the 'West Country' class; a class Q freight locomotive also known as a 'biscuit box'. Railway slang with a derogatory edge; an allusion to the shape UK, 1979.
2
any metal-skinned light aeroplane. A derogatory term used by flying club pilots of veteran, fabric-covered aircraft UK, 1979