A woman who receives much traffic in her vaginal region. Generally, men will park here, but not stay for long, and often will not come back. Eventually, her vaginal region will actually become large enough to have its own parking garage (as in a place where cars park, not penises)
"Damn Ray Ray, your girl slept with 18 guys in one night????", said Bon Quiqui, "Yo bitch is a parking garage"