Also, swim against the stream or tide. Go against prevailing opinion or thought, as in I'm voting for him even if that is swimming against the current. Shakespeare used a similar metaphor in 2 Henry IV (5:2): “You must now speak Sir John Falstaff fair, which swims against your stream.” For the antonym, see swim with the tide.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.