Treyshawn: I don't know. What?
Tom: A bench can support a family of four!
Treyshawn: Hey, that's racist!
Tom: But you know I love you, man!
Treyshawn: Yeah, I guess it's just casual racism.
The people who use "CASUAL RACISM" don't use it as intentional racial term, nor do they often have anything against other races and religions, but they use it as "normal" word or insult.
Often people who have Rap/Hip-Hop influences in their life use this, mainly fans of Tupac, N.W.A, Eazy-E etc...
"CASUAL RACISM" is often picked up from listening to Rap/Hip-Hop artists who use "Nigga" and such terms in their songs.
Hey Jamal, wassup nigga?
"Yo Tom, did you hear Sam, he just said wassup nigga to Jamal"
"Yer Leon, i heard, thats just Sams CASUAL RACISM coming out, it's because he listens to all that west-side rap!"
As an "insult" form -
"Yo Reggie, you alright nigga!"
"Hi Abdul, i heard you stole a cake, thats a bit jewish of you!"