“挥霍无度”常见的英文表达是 “live beyond one's means” 或 “spend money extravagantly”。
“live beyond one's means” 强调支出超过自身经济能力，有过度消费、入不敷出的意味，更侧重于长期的经济状态。例如：He has been living beyond his means for years, and now he's in deep debt.（他多年来一直挥霍无度，现在债台高筑。）
“spend money extravagantly” 侧重于描述花钱的行为毫无节制、过于奢侈。例如：Some people spend money extravagantly just to show off their wealth.（有些人只是为了炫耀财富而挥霍无度 。）