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1.
This term is generally known as the Spanish word used to describe a ham, cheese and tomato sandwich made in a bread roll. However a Bocadillo, or set of Bocadillo's is also commonly used along the Eastern Australian coastline by young people in the 'twenty-something' demographic to describe beautiful bouncing breasts. Despite the large number of existing slang terms used to describe breasts, when used this new term creates a simultaneous feeling of both jest and confusion, not unlike an episode of almost any American sitcom.
Usage examples:

'She had a great set of Bocadillos'
'Nice Bocadillos'
Shouted to the tune of any Gypsy Kings track - 'Bocadillooooooo!'
'...then BAM, she showed me her bocadillos'
by Chewporka November 01, 2006
 
2.
A slang term to refer to a large amount of money or something very expensive.

The misuse of this Spanish word for sandwich is known to have originated from the Cuban population of Miami, Florida after an abrupt rise in sandwich prices.
"Yo how much that chain cost you?"

"Shit was fuckin bocadillos homie!"
by cubano520 August 03, 2009