short form of the name diederik, "dirk" is also the word for a type of dagger. although always popular in its native countries, in recent years "dirk" has become a household name across the globe thanks to german basketball genius dirk nowitzki
The Dirk is a long knife, and its sheath sometimes houses a smaller knife and a fork. The origin of this arrangement was that the long knife was the conventional hunting knife, and the smaller utensils were for eating. Today, the scabbard and handles are black with silver ornimentation. The dirk is an ornament of Highland dress worn in the kneesocks.
Dirk is a Scots word for a long dagger; sometimes a cut-down sword blade mounted on a dagger hilt, rather than a knife blade. The word dirk could have possibly derived from the Gaelic word sgian dearg (red knife). It may also have been a corruption of the Low German terms Dulk or Dolk.