To 'have a chip on your shoulder' means to have an irrational resentment directed at other people (especially those who are not a member of a group or community which you identify with) because of a sense of inferiority (or an erroneous impression that others see you as inferior).
Part of the Nanotechnology glossary: A nanometer is a unit of spatial measurement that is 10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines. This was last updated in September 2005. Contributor(s): Ian Pulham.
1 nanometer, an SI unit of length, equal to 10 â9 m (a billionth of a meter). 2  nm (Unix) , a computer program used as an aid for debugging.  3 never married on matrimonial web sites or newspaper classified ads. 4  nm also refers to nautical miles usually used to define a distance in the aeronautical field.