掏腰包 (tāo yāo bāo): Pay out of one's own pocket (verb) — Meaning & Stroke Order

Are you really willing to pay out of your own pocket every time we have a gathering?

He offered to pay for the meal today.

He did not pay out of his own pocket for that unexpected expense; instead, he applied for reimbursement.

In order to buy that expensive piano for their child, the parents paid out of their own pocket without hesitation.