American Heritage Dictionary
(2)
Century Dictionary
GNU Webster's 1913
(1)
WordNet
Elsewhere on the web
The use of planted questioners is a no-no at presidential news conferences, because it sends a message to the world -- Iran included -- that the American press isn't as free as advertised.— Original Signal - Transmitting Buzz
Common belief seems to be that drinking while breastfeeding is a no-no, but from what I've read, moderate alcohol use poses virtually no harm to a breastfeeding infant.— feminist blogs
Ever since the onset of the Internet, I've heard that typing in all caps is a no-no, it's considered impolite and yelling, yet, some people just don't get it— Answerbag: Latest Questions in Question Categories
The new law clarifies the earlier law to include that texting -- not just using a hand-held cell phone while driving -- is a no-no for adult drivers.— Ask Patty - Automotive Advice for Women
She made me duck down as she drove out of the stadium-another potential no-no, apparently-and soon enough I was at Penn Station.— Vice Magazine

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