How can I get physically built without using workout equipment?

I am a male student looking to build some physical definition. My budget is minimal to none, and I am aware that it takes roughly 2 months to get some results. I am not looking to have a bodybuilders' body, or a wrestlers' for that matter, I am just looking to change my nothing into something. I am currently 5'7"ish and 170 pounds. Seeing as I am a student, my grades obviously come first, and with a job at hand, I cannot simply burn off hours at the gym, as there is too much other stuff to do.

Read more ...