footsie

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）.

foot-slog, footage, football, football pitch, footbrake, footfall, foothill, foothold, footing, footle, footlight, footlights, footling, footloose, footman, footmark, footnote, footpath, footplate, footprint, footsore, footstep, footstool (also stool), footway, footwear, footwork, fop, foppish, for, for (the) purpose of, for a moment, for a while, for ages, for all that, for another two days, for certain, for ever, for example, for fear of, for fear that,