foot filler
n.— «The cosmetic procedure, familiar the world over as a quick fix injection to iron out wrinkles, is now being employed as a cure for a condition dubbed “stilettotarsal,” when pain hits the soft tissue on the ball of the foot, known as the metatarsal area.…However, Botox injections are now being used to cure the problem, by injecting the chemical into the ball of the foot. The increasingly popular procedure, known as a “foot filler” is being carried out at the Birkdale Clinic in Crosby, Merseyside.» —“Botox used to ease high heel pain” Marie Claire (United Kingdom) Oct. 20, 2008. (source: Double-Tongued Dictionary)