Definition: The term "COGGI" seems to be a slang term for something that's not really clear. 1. COGGI: COGGI means a very small, unobtrusive penis that's often found in the anus or other areas of the body. 2. COGGI definition: "COGGI" is a slang term used to describe a penis that can be extremely sensitive and easily aroused by touch, especially when touched gently without causing any discomfort. So in summary, COGGI means a very small, unobtrusive penis that's often found in the anus or other areas of the body.