Several streakers suddenly rushed onto the stage during last night's music festival, causing quite a stir.

streakers 是名词 streaker 的复数形式。streaker 由动词 streak（快速移动）加后缀 -er 构成，特指"裸奔者"，即那些在公共场合全裸奔跑的人。这个词源于裸奔者快速移动时身体呈现的"条纹状"视觉效果。