Based on the search results, "BJU" could refer to two different things:
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"What In The World, BJU" is an Instagram account with 218 followers, 250 following, and 473 posts. It is unclear what the account is about.
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"BJU" could also refer to Bob Jones University, a private, non-denominational Christian university in South Carolina. According to a blog post on drslewis.org, the type of education fostered at BJU only encourages its graduates to adopt a siege mentality, digging in mentally and holding on to certain fundamentalist beliefs.