footsie/ˈfutsɪ; `fʊtsɪ/ n(idm 习语) play footsie with sb (infml 口) touch sb's feet lightly with one's own feet, esp under a table, as a playful expression of affection or to arouse sexual interest 用脚轻碰某人的脚（尤指在桌下以示喜爱或用以调情）.
牛津英汉双解词典