Bemused. This is the adjective derived from the verb nonplus.
Oxford Dictionary:
nonplussed: (of a person) surprised and confused so much that they are unsure how to react.
Part of speech: adj.
The battle was so bemusing and preliminary that they were nonplussed.
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.
When you take the one number away from the other number. ( No you didn't pluss em you did the other thing)
John nonplussed 11 from 13 to get 2.
Often misused as meaning unfazed, but actually means bewildered.
English majors are nonplussed about how "nonplussed" has, over time, become so misused.
(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.