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’). (source: Double-Tongued Dictionary)
I wish I would have known this word in when I played school sports. It would’ve got a good laugh.