Splurge (verb)

1. To spend a large amount of money on something, especially as a treat or for a special occasion.
2. To indulge oneself in something, especially in a way that is excessive or wasteful.

Origin:

From the word "splurge" which means to spend lavishly or extravagantly.

Examples:

1. She splurged on a new dress for her friend's wedding.
2. He splurged on a new car even though he couldn't afford it.
3. I decided to splurge and treat myself to a massage.
4. They splurged on a fancy dinner to celebrate their anniversary.
5. We decided to splurge and get a hotel room with a view of the city.