1. A school subject that teaches how the elements of the periodic table react. Chemistry is usually associated with "blowing up" and "setting on fire", but its really squinting into a test tube to watch an underwhelming chemical reaction.
2. The connection between two people, usually in a relationship. The sexual aspect is usually more talked about.
Student 1: Oh boy, I'm gonna take Chemistry next year! That means i'll blow stuff up and watch things fume!
Student 2: No it's not. It's balancing shit and watching things make pathetic bubbles.
Student 3: THERE WERE BUBBLES?!?!?!?