A particular form of male masturbation, using the wrist, rather than the hand or fingers.
With the penis hard and forced to rest on one's stomach, the wrist is used to provide the stroking action, rather than the hand.
Supposedly easier to do, when lubrication is unavailable or not at hand.
This is due to the softness of the skin at the wrist.
Can also refer to a more extreme form of fisting, in which more than the fist is used to penetrate the anus.
In addition, a term reference to cutting one's wrists, to show a degree of passion. Practised by those designated as 'emo'