usually for the Necrophiliac type:

You cook up some macaroni then let it cool. You shove what you can into a girls Vagine, and proceed to fuck. The strange sensation is said to feel like having sex with someone filled with maggots.

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.