The 'Someone Like You' singer is set to shock fans if she releases the track, a world away from her heart-wrenching ballads, which is full of expletives, reported Contactmusic.
Rapper Tinie Tempah said, "I know Adele really well and she was with me and producer Labrinth in the studio when we recorded 'Earthquake'. She also has this rap she recorded. It's really filthy."
Tempah, 24, says the track was an experiment and he isn't sure if it will ever be released, especially as Adele has joked she'll start legal proceedings if he leaks it.
"Adele sounds even better than before. I love where she's at, she's still my favourite artist in the world. I would press pause on my entire life if it meant I could go into the studio for a month straight with her," said Tedder.