Green’s Dictionary of Slang

fan-foot v.

also fan one’s foot
[fan v.2 (2) + SE foot]

(US black) to openly seek sex, to play around.

[US]Z.N. Hurston Gilded Six-Bits (1995) 995: Ah never thought well of you marryin’ Missie May cause her ma used tuh fan her foot round right smart.
[US]Z.N. Hurston Hoodoo (1995) 180: She all de time way from dat house – off fanfootin’whilst he workin’ lak a dog!