1. What does it mean?
읽씹 names a read message that gets no reply. It combines 읽다, 'to read,' with a colloquial use of 씹다 for ignoring.
Also written or said as 읽씹하다, left on read
2. The nuance
It can sound accusatory, so avoid assuming that a read receipt proves deliberate rejection. The person may be distracted or planning to answer later. Contrast 안읽씹, where the message remains unread; both labels describe a messaging situation, not a proven motive.
3. Examples
“급하게 이동하느라 읽씹한 것처럼 됐어. 지금 답할게.”
I was rushing between places and ended up leaving you on read. I'll reply now.
“질문을 보낸 뒤 읽씹당한 것 같아서 조금 기다려 보기로 했어.”
It looked like my question had been left on read, so I decided to wait a little.
Sources
National Institute of Korean Language
References support the meaning and usage. Example sentences are written for NoCapWiki.