When a person is so undeniably straight that it either

1. Makes others uncomfortable or
2. Makes you want to pimp slap them
Unlike heterosexual, which is simply the attraction to the opposite sex.
Heterosexual™ is most likely used in texts or while posting and not in speech, though a minority does say "Heterosexual tm" while speaking

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.