“玩具水枪”常见的英文表达是 toy water gun 或 water pistol（“water pistol”更偏向于指小型的、类似手枪形状的玩具水枪）。
例句：
The children were having fun playing with their toy water guns in the garden.（孩子们在花园里开心地玩着他们的玩具水枪。）
I bought a water pistol for my nephew as a birthday gift.（我给侄子买了一支玩具水枪作为生日礼物 。）