You can trace use of pre "r-word" euphemisms at least back to the mid aughts and Carlos Mencia. There are some interesting trends here. Spikes in searches seem

You can trace use of pre "r-word" euphemisms at least back to the mid aughts and Carlos Mencia. There are some interesting trends here. Spikes in searches seem to coincide with Mind of Mencia going on the air, Rosa's Law and a tweet from Ann Coulter directed at Obama. https://trends.google.com/trends/explore?date=all&geo=US&q=%2Fm%2F010rblgb https://trends.google.com/trends/explore?date=all&geo=US&q=%...