寅吃卯粮

yínchīmǎoliáng

[eat next year's food this year; be forced to borrow today's food against to morrow's income] 今年吃掉了明年的口粮, 比喻入不敷出, 预先支用了以后的收入。 亦称"寅支卯粮"

我有差使的时候, 己是寅支卯粮的了。 --《二刻拍案惊奇》