half of it

the half of it

A portion of something, typically implied to be the most important or significant part. (Often used in the negative.) Yes, the company is losing money, but that's only the half of it: if we don't show some improved sales soon, the bank will cut our credit line, too! A: "I heard the meeting went pretty poorly." B: "That isn't the half of it. Now the boss wants to do a full review of my employment, so I might even lose my job!"
See also: half, of
Farlex Dictionary of Idioms.

half of it

Only part of something, as in You saw them together, but that's just the half of it; she's moved in with him. This phrase, signifying the most important portion (more than half), is often put negatively as not the half of it, as in You thought they played badly? That's not the half of it, because they've been kicked out of the league . [First half of 1900s]
See also: half, of
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • the half of it
  • portion out
  • portion
  • a Benjamin's portion
  • Benjamin's mess
  • Benjamin's portion
  • lion’s share
  • lion's share
  • lion's share of
  • lion's share, the
References in classic literature
Half of it's the past, and the better half, too, I should say," she added, turning to Mr.
He might as well have been born with a yard and a half of it, and a remnant over."
PEOPLE using a popular Great Barr field have been left perplexed when only HALF of it was mown.
I'm hoping it'll still be there come the Games, although half of it's on my pillow already."
The bank, which was considered to be the tour operator's largest stakeholder, sold more than half of it's holding in the company after Thomas Cook sought banks' help for the second time in five weeks.
I would say that half my work in New York has been gay characters and half of it's been straight parts.