To Sleep On (first meaning): The most common meaning is to think more about something (usually overnight) and make a decision about it later.
Jenny: Are you going to take that new job working in Thailand?
Casey: It's a great job. I would be teaching children English.
Jenny: So, are you moving to Thailand?
Casey: Well, even though it's a great job, I need to sleep on it before making a final decision. It's a big change to move to another country.
Meaning: In this situation, Casey has been offered a great teaching job in Thailand, but it is a big change in her life, so she needs to think about accepting the job a little more or she needs to sleep on it.
To Sleep on (second meaning): More recently, it means to ignore or not pay attention to someone's ability or talent; to not get the attention one deserves.
Kevin: You should let Callie sing at your party on Saturday night. She has an amazing voice.
Amber: Really, I didn't know that she can sing or perform.
Kevin: Everyone is sleeping on her. I don't understand it because she is so talented.
Jenny: Are you going to take that new job working in Thailand?
Casey: It's a great job. I would be teaching children English.
Jenny: So, are you moving to Thailand?
Casey: Well, even though it's a great job, I need to sleep on it before making a final decision. It's a big change to move to another country.
Meaning: In this situation, Casey has been offered a great teaching job in Thailand, but it is a big change in her life, so she needs to think about accepting the job a little more or she needs to sleep on it.
To Sleep on (second meaning): More recently, it means to ignore or not pay attention to someone's ability or talent; to not get the attention one deserves.
Kevin: You should let Callie sing at your party on Saturday night. She has an amazing voice.
Amber: Really, I didn't know that she can sing or perform.
Kevin: Everyone is sleeping on her. I don't understand it because she is so talented.
Amber: Maybe she needs to promote herself more to let people know how good she is.
Meaning: In this situation, Callie is really talented and can sing well, but no one knows it. They are ignoring her talent.
Meaning: In this situation, Callie is really talented and can sing well, but no one knows it. They are ignoring her talent.