get it out of system

get it out of your system

to get rid of a bad feeling or a need to do something, often by expressing that feeling or by doing whatever it is that you want to do If she wants to see the world, it's best that she does it now, while she's young, and gets it out of her system. There's a lot of anger in me and I have to do something to get it out of my system.
See also: get, of, out, system