choke your chicken

   (of a male)

   to masturbate

   The derivation is from the likeness of the penis to a chicken's plucked neck:

    I went to Chi Town to clean up, but I ended up choking my chicken. (Dills, 1976 — he had unsuccessfully sought to pick up a woman for sex in Chicago)

   Whence chicken-choker, a masturbator, which is also said to be 'a friendly term truckers use for each other' (ibid.).

   I have what may be a rogue example of the meaning to urinate:

    Whenever Walker was about to go and answer a call of nature, he would announce 'Well, I'm gonna choke my chicken', (de la Billière, 1992 — we must assume the gallant general was not mistaken in his assumption of his colleague's intentions)