foot·sie \ˈfu̇tsē, -si\noun alsofoot·ie\-u̇d.]ē, -u̇t], ]i\ (-s) Etymology: from baby-talk diminutive of foot (I) slang: an action of flirting or becoming friendly or intimate often with covertness and sometimes with duplicity — usually used with the verb play < play footsie under the table > < if she was playing footsie with somebody else, how'd she find the opportunity for it — Bob Wicks >