From Longman Dictionary of Contemporary Englishlive it uplive it upinformalENJOY/LIKE DOING something to do things that you enjoy and spend a lot of money Sam was living it up in London. → live
Examples from the Corpus
live it up• Accountant used cash to live it up.• This contented canine's living it up.• The trim is the shirt; here you can live it up, get a touch more fashionable.• It's no good looking for a man's body round here if the owner's living it up in Costa Rica.• Under a false identity, he's living it up in Florence, dining out with the aristocracy.• Lisa was living it up like she didn't have a care in the world.• They lived it up while they were on Earth.• I am living it up with Survage at the Coq d'Or. 