mop head

Short definition from Wiktionary

Noun

1. 1
   The end of a mop, to which the thrums or rags are fastened.
2. 2
   A clamp for holding the thrums or rags of a mop.
3. 3
   A type of thick rounded haircut similar to that worn by the Beatles in the early 1960s.
4. 4
   A person with unkempt hair that stands away from the head.