When a chicks pants or shorts(bottoms) ar really tight and it forms a crack with two humps on the side.

When a woman's thong gets stuck in her tweeter.

When tight spandex hug the labia (better known as the outter lips of your vagina)
Some people are grossed out by camel toes, but they are completely normal and natural. If you seem to be having a camel toe, you might want to try one of the following steps 1) get larger pants 2) pull your shirt down (which might cause you to show breast cleavage which is always a plus, and attracts other sexual beings both straight males and lesbian women) 3) Flaunt it, your vagina is beautiful and everyone should be able to admire the lovely V shape that is going on down there in your pants (when sexual beings see this camel toe, they will think of sex because you will be able to better notice the outer lining of the vagina!!)

A naked or tightly clothed female reproductive organ, wherein, the inner labia (labia minora) remain inwards or, at least, do not fall below the outer labia (labia majora). The opposite of moose knuckle.

Whe you can see a girls pussy through her pants?

Camel Toe, Also known as Cameltosis, when a woman has over sized lips and they droop down, looks like a camel toe, sometimes they'll wear pants so tight you can see there clitoris, looks like a little penis; "cameltosis"