http://story.news.yahoo.com/news?tmp...catchphrase_dc
"Doh" has even found a home in the Oxford English Dictionary, which defines it as:
"Expressing frustration at the realization that things have turned out badly or not as planned or that one has just said or done something foolish. Also implying that another person has said or done something foolish."
this is so funny. to this day, i say 'doh!' all the time