When two or more individuals are in adjacent public restroom stalls at the same time and no one wants to be the first one to start shitting due to the embarrassment caused from the sounds of their poor dietary choices from the day before. This phenomenon results in awkward and lengthy silences until one individual cannot control their sphincter anymore and proceeds to "paint the bowl."
Doug: "I had a horrible game of bathroom chicken last night. Me and two other dudes sat there for like 30 minutes before I couldn't stand any longer and literally lost my shit!"
James: "I almost shit my pants today waiting for a stall to open. These two guys were playing bathroom chicken and neither of them would flinch."