To completely ruin an essay by referring to a thesaurus for every other word, thus inserting words that you don't really understand the definition of to make yourself appear smarter to the reader.
"Man, Julia's essay would have been amazing if she hadn't thesaurasized the damn thing. Now she just looks ignorant."
To replace words in a sentence, phrase, or song with other words that mean the same thing. Implies poor results, or dumbing down. This is a common practice among hymnal editors of some denominations, who are apparently among the most clueless humans walking the earth.