When your trying to be a grammar nazi and get owned when someone exposes that you spelled the word incorrectly by correcting you.
The past tense form is Out-grammared.
Person 1: My friend wants me to do exstacy with him lol
Person 2: That's not how you spell ectacy
Person 3: *Ecstasy
Person 2: Don't out-grammar me!
Person 1: What's gonig on guys?
Person 2: *Goign
Person 3: *Going
Person 2: I think I just got out-grammared.