The bone type structure inside a girl's vagina that you must maneuver around to get to the "g-spot" while fingering her.
by DWEAVE AND DIRTY January 23, 2010
A female version of "Cock Blocking". If a girl is out with a guy or girl and prevents them from getting lucky due to something they do, or just by being there.
Dave - Why am i having no luck tonight with girls tonight?!?!?
Tracey - Oh, that might be my fault, inadvertent Great wall of Vagina. All the girls must think you're with me.
Dave - Well fuck off then! I want to get lucky!
Tracey - Oh, that might be my fault, inadvertent Great wall of Vagina. All the girls must think you're with me.
Dave - Well fuck off then! I want to get lucky!
by Sir Dave Longpipe I January 10, 2014
"How did your date with Ming Hu go last night?" "Dude, I was Climbing the Great Wall of Vagina all night!"
by H. P. Lovecraft April 24, 2006