Synonyms for the phrase "dishonest card game" include "crooked card game," "rigged card game," "fixed card game," or "deceitful card game." These phrases imply that the game in question is not played fairly and that some form of cheating or manipulation is taking place. Other synonyms could include "underhanded card game," "sneaky card game," or "unscrupulous card game," which convey a similar sense of impropriety. Whatever the synonyms used, the implication is clear: the card game in question is not being played fairly or honestly, and those involved are operating outside the bounds of acceptable conduct.