Meaning of “get sth out of your system” - Learner’s Dictionary

get sth out of your system

to get rid of a strong feeling or a need to do something, especially by expressing that feeling or doing the thing you want to do:

It's not a bad idea to travel before getting a job - that way you get it out of your system.

(Definition of “get sth out of your system” from the Cambridge Learner’s Dictionary © Cambridge University Press)