euphemism for retard, named after Dan Quatro, Monroe County Legislature Republican Majority Leader, Rochester, NY, who uttered the word into a microphone as an insult to a Democratic legislator, and then refused to take personal responsibility for it when he was caught on audio and video tape during a legislative vote. He then wrote a letter of apology from all the GOP legislators, implying someone else did it. The disability rights and awareness groups came out of the woodwork to lecture the whole group for hours on political sensitivity and the use of the R-word.
"Wow, you just backed your car into that sign? What a quatro.