Twister

Part of speech: noun (n.)

1. One who twists; specifically, the person whose occupation is to twist or join the threads of one warp to those of another, in weaving.

2. The instrument used in twisting, or making twists. He, twirling his twister, makes a twist of the twine. Wallis.

3. A girder. Craig.

4. The inner part of the thigh, the proper place to rest upon when on horseback. Craig.