Grammarizing Share definition Flag The act of openly correcting someone else's improper use of grammar in front of others, oftentimes at a social gathering. I said "her and I" instead of "she and I," so she started grammarizing me at the party. Grammarizing by MCMcP January 25, 2014 0 0 Get merch Get the Grammarizing mug. Buy Now — $32.95 See more merch