1. A diatomic chemical element, number 17, which is a yellow-green gas and can form many compounds such as sodium choride.
2. The mixture of chlorine with various other chemicals that is added to pools.
Added to pools to kill harmful bacteria as well as hair. Leaves a characteristic smell that lingers no matter how much shampoo or deodorant you use. Prolonged exposure can dye your hair a dead-looking blonde (or dark brown if your hair is black).
Damn, your hair looks great and you smell good. JK LOL, you swam with chlorine this morning and even though you took a shower you look like you didn't.