bad sport

• sore loserOne who pouts after defeat
• whinerHabitual vocal complainer
• crybabyHabitual complainer who weeps
• tantrumUncontrolled display of frustration
• sulkingSilent, resentful withdrawal

cheater · gloating · unsportsmanlike · bitter · resentful · pouty · jealous · excuses · blame · storming off · grudge · petty · competitive · rage quit · meltdown · foul play · hothead · trash talk

• sportsmanshipfairness, fair play, sportsmanship, respect, integrity