footsie
/ˈfʊtsɪ/noun
mass noun
- informal the action of touching someone's feet lightly with one's own feet, especially under a table, as a playful expression of romantic interest〈非正式〉（尤指在桌下的）脚碰脚调情。
短语
play footsie
1
- touch someone's feet in such a way碰脚调情。
1.1
- work with someone in a close but covert way搞秘密交易, 勾勾搭搭：
the FBI reported that the delegate was playing footsie with the Soviets.
联邦调查局报告该代表和苏联人有勾搭。
词源
1940s: humorous diminutive of FOOT.