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Abbreviated form of "Do you see why"

Commonly used on online forums; Originated from the twoplustwo poker community.
"You can't say that, DUCY?"
by Nathan K April 24, 2007
Do you see why?

A common phrase of poker author David Sklansky, the acronym DUCY? is common internet slang on the TwoPlusTwo poker forums.

Do U C Y?
Folding this flop is absurd DUCY?
by TylerD April 25, 2007