From the Wikipedia

• The Texas sharpshooter fallacy is a logical fallacy in which information that has no relationship is interpreted or manipulated until it appears to have meaning. The name comes from a story about a Texan who fires several shots at the side of a barn, then paints a target centered on the hits and claims to be a sharpshooter.

Miscellaneous descriptions

• A Texas redneck decides one morning that he really wants to impress his friends and convince him that he is a truly wonderful shooter. To do this, he grabs his gun, goes out to his barn, and shoots a couple of random holes in the side. He then grabs some paint and draws big bullseye targets around all of the holes that he shot previously. When his friends see the holes in the center of the bullseye targets they assume (erroneously) that their friend really is a great shot.

• Wikipedia, Bifurcation