Other forms: cloying; cloyed; cloys
To cloy is to overwhelm someone with an excess of something that initially seemed sweet or pleasant. One piece of your favorite candy is pleasant, but the taste starts to cloy if you have too many more pieces.
When someone constantly showers you with compliments, it can start to cloy, making the attention feel insincere and overbearing. The verb cloy applies to anything that becomes a bit too much to be enjoyable, from sweet treats to overpowering perfumes to too much affection. Understanding how things can cloy helps you recognize that even the nicest things can lose their charm when overdone.