0 an insulting way to describe someone as crazy or as having very extreme ideas:
The press has characterized him as a swivel-eyed fanatic.
He is trying to ward off the opposition's charges that he is a swivel-eyed extremist.
Puritanism produces swivel-eyed zealots who pursue their manias with little sense of proportion.
To him they are "swivel-eyed Europhobes, hangers and floggers."
The opposing camp referred to him as "a swivel-eyed Stalinist".
He plays a swivel-eyed loon called Basil Fawlty who runs a small hotel.
