The result of the residue or tar left behind on a person's lips after doing an exceptionally large bong hit or hitting on a blunt or blizzo...usually occuring from the bottom of of a person's bag if it is of high quality pot strain like kush, chronic or indo or from smoking any very low grade pot like schwag weed, brown or mexican bud.
JC did a huge hit of the chronic and had monkey lip when he tried to pass the hit to his girl, Tia.
by jcinvegas July 01, 2008
when the sides of a womans pussy are so big they look like monkey lip
i was eatingout this girl and her monkey lips almost ate me
by mon-key lips May 16, 2004