fisheye

Short definition from Wiktionary

Noun

1. 1
   An unfriendly or suspicious glance.
2. 2
   An undesirable effect in paint, particularly automotive finishes, normally caused by oil or other contaminants on the painted surface.
3. 3
   An undesirable dull appearance in the table of a diamond that has been cut too shallow.
4. 4
   Ellipsis of fisheye lens.

Verb

1. 1
   To glance unfriendlily or suspiciously at.