This is the 871st most frequent Japanese word.
ちょい
A casual term meaning "a little," "just," or "slightly."
In this sentence, "ちょい" means "just a little/moment", a casual and informal way to say "少し".
ちょい待ってください。
Please wait for a moment.
In this sentence, "ちょい" adds a polite touch when combined with "と", used as an introductory tool often in formal contexts.
ちょいとお伺いしますが。
May I ask you something momentarily?
Here, "ちょい" is used to express a small degree or extent, synonymous with "ちょっと", but is casual and informal.