Definition of "wing-nut" []

• A bolt- or screw-nut with wing-like projections; a thumb-nut; a finger-nut. (noun)

The Century Dictionary (Public Domain)

• "Crist's veto will launch his senate bid big time as a oderate republican, everything the wing-nut Rubio does not want."
• "Since the Democrats ultimately didn't filibuster the nomination of that right wing-nut, Alito, a supreme court nominee who's a little more liberal should now by nominated and confirmed."
• "Thankfully this latest wing-nut was captured and brought to justice before he was able to carry out his engrained acts of violence against US Congress House speaker Nancy Pelosi."