A cardy is a piece thin piece of cardboard rolled onto a cylinder, and used a filter in marijuana cigarettes. Its purpose is to prevent on inhaling ash and plant matter while toking particularly in the case of blunts and fat marijuana cigarettes. The use of a cardy also prevents the formation of a roach (see roach definition).
A cardboard version of the actor Ben Hardy who played Roger Taylor in the film Bohemian Rhapsody. The cutout is currently in the possession of co-star Joe Mazzello, who has perpetuated many jokes about a potential relationship between himself and cardboard Ben.
During the group’s comeback special ”BTS NEWS” in September of 2017, RM, Jungkook’s fellow group member mentioned the group enjoying Popeye’s Samyang snacks together and Jungkook picking out and eating only the star shaped candies.
The name gained popularity later on when BTS’ label BigHit used the nickname as a hashtag (#아기별사탕) on Jungkook’s birthday post on Twitter.
Although baby star candy is Jungkook’s nickname, ARMYS have also used it as an adjective to describe moments when Jungkook does or says something cute, sweet or adorable.