Being cash-strapped, they had to postpone their vacation plans.

cash-strapped 是由 cash（现金）和形容词 strapped（紧缺的）组成的复合形容词。strapped 来自动词 strap（用带子捆扎），引申为"受限制的、紧缺的"。 cash-strapped 字面意思是"被现金捆住的"，比喻"资金紧张的、缺钱的"这种财务状况。