An activity involving physical exertion and skill that is governed by a set of rules or customs and often undertaken competitively. b. often sports (used with a sing. verb) Such activities considered as a group: Sports is a good way for children to get exercise.
Rust is Iron Oxide. Hence, any warnings concerning the ingestion of iron may apply. Ingesting too much iron, whether it be via rust, suppliments, or otherwise, can lead to unpleasant symptoms including nausea and vomiting. Long-term side affects such as liver damage can be associated with excessive iron intake.
, BS Chemistry, 1967 studied steel and aluminum. Pretty much nothing. The rust might partially dissolve in the dilute hydrochloric acid in your stomach, but other than that it will just pass on through you and be excreted in your feces. Probably not taste too good. A sick idea.