듣보잡

"Never heard of it, never seen it" (shortened, and insulting) — a put-down for someone or something obscure and unknown to the public.

[Noun] An abbreviation of ‘a worthless person whom one has never heard of or seen,’ used to refer to someone who is not well known to the public in a derogatory way.

「명사」 ‘듣지도 보지도 못한 잡것(잡놈)’의 준말로, 대중들에게 잘 알려지지 않은 존재를 낮잡아 이르는 말.

「명사」 ‘듣도 보도 못한 잡것(잡놈)’의 준말로, 대중들에게 잘 알려지지 않은 존재를 낮잡아 이르는 말.[18]