(idiomatic) Expressing one's preferences through one's actions, by voluntarilyparticipating in or withdrawing from an activity, group, or process; especially, physical migration to leave a situation one does not like, or to move to a situation one regards as more beneficial.
We already do a lot of foot voting in Nigeria, mostly by migrating abroad in search of greener pastures for reasons that are usually economic. Even within Nigeria, some foot voting is happening with the increase in rural-urban migration.