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1.
N. In a fight, someone who is terribly outmatched by their opponent, and gets beaten quite easily, with no glory going to the victor.
The president of the chess club was little more than a tomato can when he picked a fight with the captain of the wrestling team.
by Eric Ibrey Dean August 23, 2005
 
2.
Somebody who is inexperienced at something or is very bad at it. Could also mean a noob
I always get some tomato can on my pickup football team
by Dantex30 October 30, 2010