Similar to the phrase that someone's "eyes are bigger than his/her stomach," which means that someone overestimated the amount of food that he/she wanted, having eyes bigger than one's vagina means that someone overestimated the size pecker (wanker, johnson, peter) that she wanted or could handle.
Girl 1: "How was your sleepover with George last night?"
Girl 2: "I'm still sore!"
Girl 1: "Ha, I guess your eyes are bigger than your vagina!"
(Girl 1 is an example of someone who has eyes bigger than one's vagina)
Girl 2: "I'm still sore!"
Girl 1: "Ha, I guess your eyes are bigger than your vagina!"
(Girl 1 is an example of someone who has eyes bigger than one's vagina)
by jk_all_the_way October 4, 2010