To place an erect penisinbetween your partners (or your own depending on how flexible you are) feet, and to thrust in and out. Also used as a humerous insult.
the DIAMOND FOOTWANK is when a female wearing ankle socks and a short skirt (no knickers required) lies facing a male and shapes her legs like a diamond.she will then masturbate the erect penis with her feet whilst FLICKING HER BEAN. with the fantastic view the male party will see EJACULATION does not take long.