KNOWNOTHING
Know"-noth`ing, n.
Definition: A member of a secret political organization in the United
States, the chief objects of which were the proscription of
foreigners by the repeal of the naturalization laws, and the
exclusive choice of native Americans for office.
Note: The party originated in 1853, and existed for about three
years. The members of it were called Know-nothings, because they
replied "I don't know," to any questions asked them in reference to
the party.
Source: Webster’s Unabridged Dictionary 1913 Edition