Positive:
* Bookworm: This is a classic term for someone who loves to read and study. It can be used affectionately or slightly mockingly.
* Grind: This term is more modern and suggests someone who is very dedicated to their studies and puts in long hours.
* Overachiever: This implies that someone is exceeding expectations and going above and beyond in their studies.
* Brain: This is a simple and direct way to describe someone who is intelligent and excels in their studies.
Neutral:
* Nerd: This term can be used both positively and negatively, depending on the context. It usually implies someone who is very focused on academics and may have less interest in other things.
* Scholar: This is a more formal term, but can be used in a playful way to describe someone who is very studious.
Negative:
* Dweeb: This term is more derogatory and implies someone who is socially awkward and overly focused on their studies.
* Geek: This term is similar to "nerd" and can be used either positively or negatively.
* Swot: This term is British slang and is often used in a negative way to describe someone who is overly studious and boring.
The best slang word to use will depend on the specific context and the tone you want to convey.