For "clown"

Slur	Represents	Reason & Origins
Clown	Irish	Not used so much as a racial slur, however, the classic clown is based on a stereotyped image of Irish people: bushy red hair, a large red nose (from excessive drinking), and colorful clothes often with plaids, and often with a great many patches to represent that the Irish were poor and could not buy themselves new clothes. With excessive plaid is a Scottish variation.
Clown-Car	Mexicans	Used to describe the overcrowded vehicles of migrant workers.

The Racial Slur Database, since 1999. Not copyrighted in any way, shape or form.

This database was created entirely from data gleaned off the 'net and via submissions from people like you and your parents. It's supposed to be funny and/or informational. Calm down.