Improper; dubious; unethical; unfair: Something not quite cricket happened
[1900+ British; fr inadmissible actions in the game of cricket]
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with not cricket
Unfair, unsportsmanlike, as in It's not cricket to let him go without notice. This term, in which the sport of cricket is equated with upright behavior, survives in America despite the relative unfamiliarity of the sport there.