The beliefs attitudes, and actions of individuals that support or perpetuate racism. Individual racism can occur at both an unconscious and conscious level, and can be both active and passive.
Individual Racism at the subconscious level. A White person who locks their car doors when a Black man walks by, refuses to date an Asian men because of their emasculation, refuses to date a Black women because of her attitude, doesn't want to hire a Latino because they are lazy (these are all stereotypes that he/she may believe)
Individual Racism at the conscious level is having an acknowledged prejudice against People of Color.