1) geek.
2) extremely intelligent person who lacks social skills.
3) derogatory term for such people that stereotype them as people who examine things very closely and look down on others that are not as intellectually intelligent.
4) a nickname for scientists, who "squint" a lot in their work
"The squints were assigned to examinethe body very closely to find out clues about how the person was killed."
to be incapable of opening one's eyes more than just a slit. May result from constant exposure to smoke, i.e. in the case of a pothead, or in the event of being struck in the face by a piece of citrus fruit at high velocity.