colon wrecker 

A penis that has the ability to go so far inside of a female in sexual intercourse, that it makes the females colon or other internal organs slightly ache, itch, or bleed (maybe bleed if it's a 2 meter beater)

Megan: I hooked up with a guy last night, and he had a colon wrecker.
Julie: No way! How do you feel?
Megan: It was great, but my colon feels a little achy

colon wrecker by SeahawksFan24 March 27, 2016