tomato can
An exceptionally poor boxer, one who is often paired with a much better boxer so as to improve the latter's statistics and win percentages. The up-and-coming star boxer suffered a huge upset last night at the hands of a tomato can who everyone expected to lose.
tomayto, tomahto
A negligible, trivial, or unimportant difference, distinction, or correction. (Refers to the American pronunciation of tomato as "tomayto," compared with the British pronunciation of "tomahto." Specifically, it is an allusion to a verse in the song "Let's Call the Whole Thing Off": "You like potayto, I like potahto; you like tomayto, I like tomahto; potayto, potahto, tomayto, tomahto, let's call the whole thing off!") A: "Well, technically, the Hindenburg was a rigid airship, not a blimp." B: "Eh, tomayto, tomahto, who cares?"
tomato juice
1. Literally, juice from a tomato. My grandfather loves to drink tomato juice, but I can't stomach it. I think this Bloody Mary needs some more tomato juice.
2. slang Blood, especially from a boxer. (This phrase is likely related to the term "tomato can"—an exceptionally poor boxer.) Look at that fool, leaking tomato juice all over the ring already!