Synonyms for Lowbrow (same or very similar meaning)
WordNet sense 1 (a person who is uninterested in intellectual pursuits):
anti-intellectual, philistineWordNet sense 2 (characteristic of a person who is not cultivated or does not have intellectual tastes):
uncultivated, lowbrowedWordNet sense 3 (not intellectual):
nonintellectualFrom the ODE community, based on WordNetadd/edit