Wichse

Etymology
In the sense “polish” an 18th-century, from a variant of. The former verb then developed the sense “to wank, masturbate (of a male)” based on the back-and-forth movement. The noun sense “cum, semen” thence, but plausibly reinforced by the already existing sense of the noun.

Noun

 * 1)  polish, especially shoe polish
 * 2)  cum semen
 * 1)  cum semen