(no object) informal
to spend more money than usual on something for yourself
You should let yourself splurge once in a while.
— often + on
We decided to splurge on a bottle of good wine for dinner.
— splurge noun, plural splurges informal (count)
— usually singular
She went on a shopping splurge. (=spree)
This year’s big splurge (=expensive purchase) was a new car.