Is really into, in slang

STANS

Think of superfans who obsessively support celebrities or artists online.

"Stans" is slang for someone who’s obsessively devoted to a celebrity, artist, or fandom—like a superfan. The clue plays on the phrase "is really into," which in modern internet culture often gets shortened to "stans" (from Eminem’s song Stan about an overzealous fan). It’s a casual way to say someone adores something or someone to an extreme degree.