fool and his money are soon parted, a

A silly or stupid person readily wastes money. For example, Albert is known for giving waiters enormous tips—a fool and his money are soon parted. This proverbial expression has been cited again and again since the mid-1500s.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.