Wiktionary
arm candy
n. (context idiomatic English) An attractive, seemingly romantic companion who accompanies a person in public simply so that one or both of the individuals can gain attention, enhance social status, or create an impression of sexual appeal.
Usage examples of "arm candy".
She knew she wasn't any man's idea of arm candy, but she was glad Elkanah had spoken.
She knew she wasnt any mans idea of arm candy, but she was glad Elkanah had spoken.
For a husband utterly lacking in character, such a spouse was the moral equivalent of arm candy, meant to dazzle the cognoscenti, not with her beauty, but with her sterling reputation, making it less likely that Sharmer would be the object of suspicion or the subject of close scrutiny.