Definition & Meaning of "cuffed"in English

What does "cuffed" mean in relationship slang?

The slang adjective "cuffed" describes someone who is tied down in a committed romantic relationship and therefore no longer single or freely dating. The term comes from "handcuffs," creating the image of being attached or restrained by a partner. It became especially associated with the phrase "cuffing season," referring to periods when people seek relationships during colder months.