The word "more pigpen" is not a common phrase or word. However, if we break down the phrase, we can find antonyms for each individual word. "More" can be antonymized as "less," meaning not as much of something. "Pigpen," which refers to a dirty or cluttered area, can be antonymized as "clean" or "organized." Therefore, antonyms for the term "more pigpen" may be "less clean" or "less organized." It is important to note that the phrase "more pigpen" may not make sense in most contexts and therefore, the need for antonyms for this term may be rare.