How do I get Flash off my Mac?

I made the mistake of installing Adobe Flash Player on my MacBook, and its been pretty bad. Youtube plays 2-5 seconds of the video THEN plays the ad, and other miscellaneous problems have arose. What do I need to do to wipe Flash off of my Mac? What will I be missing out of if I do so? Sorry if it is a silly question, I'm just pretty new to OS X.