send to dorse

Verb

 * 1)  To throw (a person) onto their back; to knock out.
 * 2) * a. 1823, Fancy Gazette, quoted in 1823, John Badcock, Slang, a Dictionary of the Turf, the Ring, the Chase, the Pit, of Bon-Ton, and the Varieties of Life
 * Gas now planted his favourite hit under the left listener of his antagonist, which sent him to dorse.