自腹を切る

[jibara-wo-kiru]

Literal translation:

commit seppuku, cut one’s own belly

Meaning:

pay out of one’s own pocket, foot the bill

Example:

旅費は会社から払い戻されなかったので、彼が自腹を切る羽目になった。:

Since the company didn’t reimburse him for travel expenses, he had to pay them out of his own pocket.

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払い戻す [haraimodosu]: reimburse