physics

1) Doing physics means doing something rubbish.
2) When you do a work that has no purpose in your life (in short rubbish)
3) A thing founded by Sir Isaac Newton (which is also rubbish)
4) Rubbish, Garbage

1) Open your eyes and have some purpose in your life rather than doing physics.
2) What physics are you doing, man!
3) A bunch of physics get collected in my brain after doing physics.