Somebody who has been fucked in the ass so many times that their rectal muscles fail to contract anymore.  Thus their asshole is very loose, being very much like a piece of raw calamari.
Poor Russ, he shits himself everytime he farts. He has been reemed in the ass so many times that he has developed a calamari anus.
by the shrimping king August 11, 2006
 Get the Calamari anusmug.
Get the Calamari anusmug.