After the game, she belted the whole bottle of sports drink.

belted 是动词 belt 的过去式。belt 本意是"腰带"，作为动词时引申为"快速而大量地喝下"，常用来形容一口气喝完饮料的动作。belted the whole bottle 表示"一口气喝完整瓶"。