have not heard the half of it(redirected from had not heard the half of it)
have not heard the half of it
To know only a small part of how bad something is, but without understanding the complete situation; to underestimate or be uninformed about how bad a situation really is. Our bosses think that this is a major setback, but they haven't heard the half of it. We're months, not weeks, behind schedule! A: "I heard you and Terry were going through a tough time." B: "Oh, you haven't heard the half of it."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.