Guiedo is the act of two partners putting their asses together. They will then proceed to shit into eachother's assholes.
Bob: Wow, Jerry, you must not have taken a shit for days! I'm still trying to get it all out from last night's guiedo session!
Jerry: *laughs* It's true...
Italian American. (See also original gangsta
Look at that guiedo in his caddy with his St. Christopher statue on the dashboard!