For checking the transcript: https://www.buzzsprout.com/2379282
Splash out
means to spend a lot of money on something, often as a treat or for something luxurious. It’s about indulging yourself with a big purchase or experience.

Examples:
1- For their anniversary, the couple splashed out on an expensive meal at a Michelin-starred restaurant.
2- After her promotion, Emma decided to splash out on a weekend spa retreat.