A term used when someone goes too far with a joke and it becomes racist.
Someone will invariably yell out, "CLICK" The sound of the racist button going off. The person who said the joke only hearing the word "CLICK" knows he has crossed a line and needs to back out of that conversation before trouble starts.
"What do you call a bus load of NI#$$# going over a cliff?
A good start."

"CLICK!!!!!!"

"Oops sorry guys did not mean to set off the racist button."
by FA-Q May 6, 2012
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