‘'뱉어 (Spit It Out)’‘ is the solo debut single from MAMAMOO member, Solar.

The song has a fast, attention-catching beat with a catchy guitar tune.

From a previous interview about the song, Solar wanted to show how strong she was. She made the song bald and brave as described. In her interview she had said ‘'My solo album 'Spit it out’ is an album where I show who I am.‘’ Her expectations for the viewers were to reveal her true self.