WTF is a chocolate foot? Let's ask google:
Originally Posted by double-tongued dictionary
chocolate foot n. the foot favored to use or to start with when running, biking, or kicking; one’s dominant foot.
Etymological Note: Perhaps a calque from the German Schokoladenbein ‘favored leg’ (literally ‘chocolate leg’). A similar German word is Schokoladenseite ‘attractive side’ (literally ‘chocolate side’).