This is a penis that is rather girthy but  short in length, similar to a tuna can.  Often hard to work with while trying to have relations.  Performing Doggy-Style with a woman who has 'back' is out of the question for a man sporting a 'tuna can'.  The tuna can cannot enter the zone.
Bill was a very funny guy and great to be with...but we had to break up.  He had a tuna can penis and couldn't satisfy or even enter me.
by Smellman  March 5, 2009
 Get the Tuna Can Penismug.
Get the Tuna Can Penismug. A short, but very wide human penis. It is widely accepted that one does not have intercourse with a tuna can penis, but rather uses it to punch their lover in the cunt.
Shelly: "I heard Mike has a thick dick. I am so jealous you hooked up with him!"
Nelly: "Umm, we didn't hook up so much as he punched me in the cunt with his tuna can penis"
Shelly: "gross."
Nelly: "Umm, we didn't hook up so much as he punched me in the cunt with his tuna can penis"
Shelly: "gross."
by Tunacanenis July 31, 2011
 Get the Tuna can penismug.
Get the Tuna can penismug.