pintle

Short definition from Wiktionary

Noun

1. 1
   The penis.
2. 2
   A pin on the buckle of a belt used to fit into the holes of the belt and hold it at the desired level of tightness.
3. 3
   A pin or bolt, usually vertical, which acts as a pivot for a hinge or a rudder.
4. 4
   An iron pin used to control recoil of a cannon or around which a gun carriage revolves.