Top Definition
To change your style of writing while sending an anonymous message, so the other person can't tell it's you.
I didn't want Sylvester to know I was the one who left the love note in his locker, so I grammarmasked the whole thing by showing blatant disregard for verbs versus adverbs, and also I wrote the whole thing with my left hand.
by 1279173 June 30, 2013
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