godan verb (-ru), intransitive verb
make a typo; type the wrong character
Slang verb used for typing errors, especially when inputting Japanese text. Intransitive; the typo itself is the subject.
急いで打ったら、よく誤字る。
When I type in a hurry, I often make typos.
さっきのメッセージ、誤字ってた
That message you sent earlier had a typo.