unsporting
GENERAL OFFENSE IN SPORTS COMPETITION
Unsporting behaviour; Unsportsmenlike Conduct; Unsportsmanlike Conduct; Ungentlemanly conduct; Unsporting conduct; Unsporting; Unsportsmanlike; Unsportsmanlike behavior; Unsportsmanlike behaviour; Unsporting antic; Unsportsmanlike antic; Unsportsmanship
If you describe someone playing a game as unsporting, you are critical of them because they have done something that is unfair to their opponent.
Players are warned, fined and can even be disqualified for unsporting actions in the heat of contest.
ADJ [disapproval]