a penis that resembles a can of tuna, very thick but not very long. This trait is usually attributed to men that are white, tall, skinny, and usually own ridiculously huge dogs, trucks, and guns.
Dude, Brian got so drunk last night he stuck his dick in that fat chick. I bet she loved the tuna can.
by SicAssMic April 12, 2009
a chode. In more detail, a cock that is thicker than it is long. Not to say that they are immensely thick, but that they lack any type of significant length. This term came to light after meeting a friend of mine, who is short and stocky. So, by assumption, my friends and I said that his proportions must be consistent.
He is short and stocky and must have a tunacan.
by anonymous124 October 13, 2005