List of phrases that sound racist but aren’t:
White on rice
Black lung
Mexican standoff
Dark humor
Honky tonk
Reverse Polish Notation

List of phrases you may not know are racist but are:
Jew someone down (as in a negotiation)
“I’ve been gypped!” (as in “I’ve been cheated”)
Afro-engineering (this version seems passive aggressive but isn’t. It only seems passive because there’s a more direct version that is overtly offensive)
Cracker Barrel

This public service message is brought to you so that you don’t accidentally sound like a bigot.