Just a day after North West sent out her first tweet, Kim Kardashian, 35, slammed a critic who called out the tot.

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The comment, sent by Twitter user IsItCrystal, said, "They learn how to use cellphones now before they can ever wipe there butt." The tweet has since been deleted.

The second-time mom fired back, “@isitcystal well at least North will know how to f–king spell you’re and their."

Sounds like someone needs a grammar lesson ASAP!