What is what does it mean when a guy calls you b?

When a guy calls you "B," it could mean a few different things depending on the context and the nature of your relationship with him. Here are a few possibilities:

1. Nickname or Shortened Version: "B" might be a shortened version of a nickname or endearment specific to your relationship. For instance, it could be short for "babe," "baby," "beautiful," or another term of affection.

2. Casual Address: In some social circles, "B" is used as a casual way to address someone, similar to "bro," "dude," or "buddy." It may not have a specific meaning beyond being an informal way to talk to someone.

3. Personal Significance: It might hold personal significance specific to your relationship. It could be an inside joke or a term tied to something personal between the two of you.

4. Cultural Influence: In some cultures or communities, using "B" is a common practice, popularized in part by hip-hop culture and media.

If you're unsure why he's using it or if it holds significance, you might consider asking him directly to understand better. This can provide clarity and also enhance communication in your relationship.