As used in the comic strip This Modern World. I think it's referring to the 3rd definition:
Main Entry: pabáuálum
Pronunciation: 'pa-by&-l&m
Function: noun
Etymology: Latin, food, fodder; akin to Latin pascere to feed -- more at FOOD
Date: 1733
1 : FOOD; especially : a suspension or solution of nutrients in a state suitable for absorption
2 : intellectual sustenance
3 : something (as writing or speech) that is insipid, simplistic, or bland