drain the main vein

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Related to vein: varicose vein, portal vein

drain the main vein

vulgar slang Of a male, to urinate (where "main vein" is slang for the penis). Will you order us another round of drinks? I'm just going to go drain the main vein real quick.
See also: drain, main
References in classic literature ?
Of this we have abundant proof in the ordinary experience of surgeons, who, by binding the arm with a tie of moderate straitness above the part where they open the vein, cause the blood to flow more copiously than it would have done without any ligature; whereas quite the contrary would happen were they to bind it below; that is, between the hand and the opening, or were to make the ligature above the opening very tight.
In the next place, the consistency of the coats of which the arterial vein and the great artery are composed, sufficiently shows that the blood is impelled against them with more force than against the veins.
He quested across the face of the slide to the opposite wall of the vein and back again.
For a hundred feet up and down he traced the walls of the vein.
But this he gave up as a vain task; and he sent more slides of soil down upon the scene of his labor, until no sign remained of the out-jutting walls of the vein.
And still, Amiel too, be it remembered (we are not afraid to repeat it), has said some things in Pascal's vein not unworthy of Pascal.
No man knows, till he experiences it, what it is to feel his own lifeblood drawn away into the veins of the woman he loves.
As she spoke, Lucy turned crimson, though it was only momentarily, for her poor wasted veins could not stand for long an unwonted drain to the head.
The veins were standing out like whipcord on Granet's flushed forehead.
it is the duty of each who has Saxon blood in his veins.
But the winter has chilled my veins, and the frost has nipped my buds, and the storm has broken my branches, and I shall have no roses at all this year.
All night long you must sing to me, and the thorn must pierce your heart, and your life-blood must flow into my veins, and become mine.
Being female: Women are more likely to get varicose veins than men, possibly because female hormones can relax the vein walls, making the valves more likely to leak.
Foam sclerotherapy: A special foam closes veins unsuitable for thermal ablation.