let it rip v. phr.,
used imperatively,
slang Don't be concerned; pay no attention to what happens.
Why get involved? Forget about it and let it rip. 2. (Imperatively) Do become involved and make the most of it; get in there and really try to win.
Come on man, give it all you've got and let it rip! [TahlilGaran] English Idioms Dictionary ▲