Extravagant or wasteful spending; squandering money. Often used with the verb 'suru' (散財する).
給料日が来ると、つい散財してしまう。
When payday comes, I tend to splurge.
最近は趣味にお金を使いすぎて散財気味だ。
Lately I've been spending too much on hobbies and somewhat splurging.
節約のために、無駄な散財を控えることにした。
To save money, I decided to refrain from unnecessary extravagance.