Verb; To take one's hand and arrange it in such a way that the fingers line up and are parallel with the thumb. If done correctly will resemble a duck's beak. "Ducking it" is used to stimulate one's penis in the act of masturbation and induce ejaculation.
I was ducking it all night last night. It was the shit!
by Brian M. aka "nigga" May 20, 2003