lash out (something) 
phrasal verb with lash verb uk/læʃ/ us/læʃ/
  UK informal      
 浪费,挥霍(钱财)
to spend a large amount of money in a way that is unnecessary or that wastes it
  He lashed out £5,000 on his daughter's wedding. 他为女儿的婚礼一下子花了5000英镑。