To begin to defecate while still fully clothed, but holding it in enough so that the shit is not ejected, thereby causing the end of the shit to tap your cotton underwear.

Similar to "Dot Cotton"

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.