noun
a certain someone; you-know-who
Jocular, teasing way to refer to someone without naming them, often implying the listener knows who is meant. Similar to 誰か but with a playful, slightly mocking tone.
See also: 誰か
誰かさんがまた遅刻したらしいよ。
It seems a certain someone was late again.
誰かさんにそっくりな人を見かけた。
I saw someone who looked just like you-know-who.