An offensive, racist word for a Latino person (i.e. Mexico, Puerto Rico, South America).
It was originally spelled spick, a contraction of "Spanish Mick" (Mick
being slang for an Irishman). Since both Irish and Hispanics are Catholic, as opposed to Anglo-American Protestants, people stereotyped Spanish and Irish into a single group based on their faith, hence Spanish Mick, or spick.
Redneck: Damn dirty spics! Thinking they can take MY hard-earned money for welfare!