na-adjective, noun which may take the genitive case particle 'no', noun
self-indulgence; doing as one pleases
Describes acting freely without restraint, often with a negative connotation of overindulgence or selfishness. Commonly used in the pattern 好き放題に〜する.
He is indulging himself freely with his parents' money.
If you live a self-indulgent life, you'll regret it later.