squander away
To use up or fail to take advantage of some resource in a wasteful, frivolous, or negligent manner. A noun or pronoun can be used between "squander" and "away." I'm not about to lend you any more cash—you already squandered the $100 away that I gave you! In my old age, I look back on my life and bemoan squandering away my youth. It makes me sad to think of her squandering her potential away in some dead-end office job.
squander something away
to waste something; to use up something valuable wastefully. Where is all the money I gave you last month? Did you squander it all away? Frank squandered away all his assets.