頭 - Tou2 - Head

This can be used in a strange idiom that I love saying. You repeat back what somebody just said to you and put 你的頭 - Ni3 De5 Tou2 - “Your Head” at the end. Like if Jenny tells me to wash dishes I’m likely to say:

洗你的頭! - Xi3 Ni3 De5 Tou2! - Wash your head!