Verb
let the good times roll (third-person singular simple present lets the good times roll, present participle letting the good times roll, simple past and past participle let the good times roll)
(chiefly imperative) To have fun or live fully; may imply letting things that are going well proceed; if it ain't broke, don't fix it.
Let the good times roll, everyone!
live out where the real winds blow-to sleep late, have fun, get wild, drink whisky, and drive fast on empty streets with nothing in mind except falling in love and not getting arrested... Res ipsa loquitur. Let the good times roll. Hunter S. Thompson
Let the good times roll! Source: Internet