1 definition by Osgoodslaughters
When a girl is giving head and her top lip goes under her teeth, and gives her the appearance of an old woman missing her dentures.
"Damn last night kelsey was giving me head and when I looked down she was grandma lippin me!"
"Ew thats gross man!"
"Ew thats gross man!"
by Osgoodslaughters June 19, 2009