"Sloppyhead" is a term used in the context of adult content. It refers to a partner engaging in oral sex while their head is covered or wet with saliva, often from performing the act for an extended period of time. In some cases, it can also refer to someone having unkempt or messy hair due to similar reasons. This term is typically used playfully and adds a level of excitement to the scene by emphasizing the passionate and intense nature of the oral sex being performed.