·
The · is a dot. A bit like the full stop (.), but higher up. Used as a shorthand for 'multiply' in mathematics (because they don't want to get × confused with x).
Equation: 5x² · 2y = 10x²y
·
Sometimes used after a word for emphasis.
Me: Pr0n makes me happy.
Him: PR0N···
Him: PR0N···