The Collaborative International Dictionary of English v.0.48:

Fluke \Fluke\, v. t. & i. [imp. & p. p. Fluked; p. pr. & vb.
   n. Fluking.]
   To get or score by a fluke; as, to fluke a play in billiards.
   [Slang]
   [Webster 1913 Suppl.]