overspend
verbUK /ˌəʊvəˈspend/
US /ˌoʊvərˈspend/
To spend more money than you have or planned.
If you overspend on toys, you won't have money for snacks.
OTHER MEANINGS
2. To spend more than a set limit or budget allows.
The city overspent its road repair budget by millions.
3. To use up more of something than is sustainable.
We overspent our energy on the first day of the hike.
4. An act of spending too much money.
The holiday overspend left them short for rent.