conker
noun uk/ˈkɒŋ.kər/ us/ˈkɑːŋ.kɚ/
[ C ] mainly UK七叶树果
the shiny brown poisonous nut of a horse chestnut tree
conkers [ U ] UK 康克戏（儿童游戏，两人用串在绳上的七叶树果相击，击破对方七叶树果者获胜）
a children's game in which you have a conker with a string through it and try to break another child's conker by hitting it with yours
He looked as disappointed as a small boy who's just been beaten at conkers.
I love to hear the children laughing as they play conkers.
Many schools have now banned games such as conkers.
I'd bet on anything, even a game of conkers.
He is disappointed that his children don't play conkers.