yank

From The Collaborative International Dictionary of English v.0.48:

Yank \Yank\, n. [Cf. Scot. yank a sudden and severe blow.]
   A jerk or twitch. [Colloq. U. S.]
   [1913 Webster]
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From The Collaborative International Dictionary of English v.0.48:

Yank \Yank\, v. t. [imp. & p. p. Yanked; p. pr. & vb. n.
   Yanking.]
   To twitch; to jerk. [Colloq. U. S.]
   [1913 Webster]
.

From The Collaborative International Dictionary of English v.0.48:

Yank \Yank\, n.
   An abbreviation of Yankee. [Slang]
   [1913 Webster]