noun
A person devoted to pleasure-seeking, often with a nuance of dissipation or debauchery. Slightly old-fashioned; more common in literary or historical contexts.
彼は若い頃、道楽者として名を馳せた。
In his youth, he made a name for himself as a libertine.
noun
Someone who avoids work and indulges in leisure or hobbies. Often carries a critical tone.
あの道楽者は一日中パチンコばかりしている。
That lazy person spends all day playing pachinko.
noun
hobbyist; enthusiast
A person deeply absorbed in a hobby or pastime, sometimes to the point of neglecting other responsibilities. Can be used affectionately or critically depending on context.
父は釣りの道楽者で、週末はいつも海に出かけている。
My father is a fishing enthusiast and always goes out to sea on weekends.
道楽 is the noun for 'hobby' or 'dissipation'; 道楽者 is the person who engages in it.
Compound of 道楽 (どうらく, 'hobby; dissipation') + 者 (もの, 'person'). The exact historical derivation is uncertain, but the term has been used since the Edo period to describe someone devoted to pleasure or leisure.