it's an expression of frustration

(pronounced: doh)

It's an expression of suddenly realizing something. Made popular by Homer Simpson, it's all in the sound of how you make it: "DOH!" 

An abbreviation seen in texting, online chat, instant messaging, e-mail, blogs, newsgroup postings, and social media.

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See also : SHID  
NetLingo Classification: Acronyms and Text Message

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