Revenge spending

Revenge spending is the money you drop to make up for lost time, so to speak. It's the big vacation you book to make up for the trips you missed last year, or the new furniture you buy after putting up with your getting-on-in-years sofa during the pandemic.

And while a little splurging after months of careful saving (or unwilling saving, because there wasn't much to spend on) is perfectly understandable, going overboard as a sort of self-comfort or revenge for everything you gave up in the last year can hurt you in the long run.