HEARTILY FOOTSIE欢乐之城
play footsie在桌底下偷偷碰脚;情侣在桌底下碰脚;勾结
PHRASE（习语） If someone plays footsie with you, they touch your feet with their own feet, for example, under a table, often as a playful way of expressing their romantic or sexual feelings toward you. (在桌下用脚)调情 [非正式][usu PHR 'with' n]