expression, ichidan verb
loosen the purse strings; spend freely
Idiomatic expression meaning to become less tight with money, often implying a sudden or temporary willingness to spend.
ボーナスをもらったので、財布の紐を緩めて新しいパソコンを買った。
Since I got a bonus, I loosened the purse strings and bought a new computer.
旅行中
When traveling, I can't help but loosen the purse strings.