Can somebody help me with this expression? When can I use this : Wash something out Thanks

Can somebody help me with this expression? When can I use this sentence?: Scream my lungs out

Hi there, I'm Eduardo from Mexico XD!! I'm an English student in Mexico and I work at a Company as a Operator in Road tracking services, I like listening to heavy metal music and going to Concerts as well. I found this page because I was looking for people to improve and practice my English, Is someone outthere who wants to practice the language?