Often misused as meaning unfazed, but actually means bewildered.
English majors are nonplussed about how "nonplussed" has, over time, become so misused.
by ekf March 27, 2005
(Verb) Unable to act, speak, or think; bewilderd
After reading many letters and statements, Gean was nonplussed by it all and had to take a breath.
by binomialNomenclaturesk November 23, 2009
The news of a new reorganization got him nonplussed.
by Biragana May 12, 2010
Someone that doesn't have a Google+ Account, or perhaps any other social network account. A person who may have no knowledge of social networks.
You missed the party? I had no idea you were Nonplussed.
by Kingmikey July 15, 2011