Me lol.

An insulting nickname for early US Italian immigrants. They acquired over 50 different nicknames (according to Irving Lewis Allen - 1983), one of which was spic.

This is for all the brown people...
Spanish Person in Charge. I called my mexican boss a spic once when I was mad and I was absolutely correct, ha ha!

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.

as in 'Spic and Spam', a modern reinterpetation, it is used to describe something pleasing or positive

S P I C
Spanish People In Control