IDIOMS

turkey shoot

(idiomatic, by extension) A unequal competitive situation in which one party easily defeats the other(s).

Example: 1913, B. M. Bower, The Uphill Climb, ch. 3:
  Behind his barricade of barrels, Sam heard and shivered like a gun-shy collie at a turkey shoot.
1919, William MacLeod Raine, A Man Four-Square, ch. 3:
  [H]e had seen a thirteen-year-old boy named Jim Clanton win a turkey shoot against the best marksmen of the hill country.
2009 Feb. 25, "Boy held in Pa. killing to go to juvenile facility ," USA Today (retrieved 16 July 2012):
  Debbie Houk said Jordan, a hunter, knew a lot about guns and was a good shot. On Valentine's Day, he beat out many older and more experienced hunters at a turkey shoot. "I'll never cook that turkey. It's the same gun that killed my daughter," she said.
1960 July 11, "Aviation: The Embattled Farmer," Time:
  In the Battle of the Marianas, which pilots called "the turkey shoot," they downed 360 Japanese planes in a single day, the record bag of the war.
1991 April 14, Leslie H. Gelb, "Foreign Affairs: White House Guilt?," New York Times (retrieved 16 July 2012):
  Almost everyone argued that it would be inhumane for Americans to engage in a turkey shoot against fleeing Iraqi soldiers.
2009 Nov. 15, Mike Higgins, "Andrew Marr: The Making of Modern Britain, BBC2 (TV review)," The Independent (UK) (retrieved 16 July 2012):
  The U-boats, for instance, had a stranglehold on the merchant shipping supplying Britain, and it was thought that a convoy system would turn into a turkey shoot.
1968 Nov. 17, Bob Monahan, "Delaware Thrashes B.U. 41-13," Boston Globe, p. 71 (retrieved 16 July 2012):
  The University of Delaware Blue Hens had themselves a turkey shoot here Saturday at Delaware Stadium as they humbled Boston University, 41-13, before 10,350.
2011 June 28, Chris McGrath, Tennis: ‘Devastated’ Williams sisters rue double loss," The Independent (UK) (retrieved 16 July 2012):
  Their exit from the tournament, without a set between them yesterday, at least demonstrated that the women's game is not quite the turkey shoot it might have seemed.