Some Tamil PJs using the word மாசு (means unclean, impure). Inspired by Akarsh Simha and Kumar Appaiah.

Q: What do you get when you dope your field effect transistors (FETs) with too many impurities?
A: MOSFET (மாசுFET) - Kmap

...Q: A 100% pure block of ice always moves at the speed of light. Why?
A: It has no maasu (மாசு)! - Akarsh

Q: Why can the dirty killer not stop with killing just one person?
A: He was a mass (மாசு) murderer! - Kmap

Q: Why do stones with no sharp edges very pure?
A: Because stones with no sharp edges roll and "rolling stones gather no moss (மாசு)" :D - Muthu