Turning your hand to the side and in a fast, karate chop like motion chopping between the vagina. If done effectively the split check will result in a camel toe.

The split check is also a way of determining the gender of the truely androgynous.

The split check can also be performed between the butt cheeks.

A pick me is a woman that is willing to do anything for male approval. She will embarrass or throw other women under the bus to achieve this goal. The unfortunate thing about a pick me is usually the men they are trying to seek approval from are of poor quality and treat women badly, leaving little real benefit for the pick me.