Type A Pooper
Somebody who always poops at the same times every day or every other day, as if they shit on a schedule
Bob is a Type A pooper. He always has to go at the same time every day.
Type B Pooper
Somebody who's shits are not aligned to a schedule. They shit at random times. This is the most common time
Lisa is a type b pooper. She does not shit on a schedule.