extrapurchase
nounUK /ˈɛkstrəˌpɜːtʃɪs/
US /ˈɛkstrəˌpɜːrtʃɪs/
An extrapurchase is something extra you buy besides what you really need.
Mom bought a toy as an extrapurchase at the store.
OTHER MEANINGS
2. An additional item bought beyond the planned amount.
The store offered a discount on every extrapurchase.
3. A purchase made on top of a main order.
Shipping was free, but the extrapurchase cost a little more.
4. Something bought that was not on the shopping list.
That candy was an extrapurchase I did not plan for.