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2.
A particularly hirsute female pubic region resembling a primate's forehead.
Sue sported a very fine monkey's forehead.
by Dave B October 02, 2003
 
1.
A word used to describe the female genitalia.
My god, look at that mucky bird from the council estate, those leggings are so tight i can see her monkeys forehead.

OR

Is that a cock in your leggings? Nooo they are that tight it allows observers to see my monkeys forehead. Im off back to the estate for a banjo!!
by Quim October 15, 2006