not half

Related to not half: not half bad

not half

Absolutely; I strongly agree. Primarily heard in UK, Australia. A: "Will we go down to the pub for a couple of pints?" B: "Not half!"
See also: half, not

not half (something)

A more emphatic way to say "not." Primarily heard in UK. Did you just say that 2+2=5? Geez, you're not half smart, are you?
See also: half, not
Farlex Dictionary of Idioms.

not half

1 not nearly as. 2 not at all. informal 3 to an extreme degree; very much so. British informal
See also: half, not
Farlex Partner Idioms Dictionary

ˌnot ˈhalf

(British English, informal) used to emphasize a statement or an opinion: It wasn’t half good (= it was very good). ‘Is it hot outside?’ ‘Not half. It’s much too hot for me.’
See also: half, not
Farlex Partner Idioms Dictionary

not half

Not at all: "Fancy housing? Not half likely, ma'am" (Russell Baker).
See also: half, not
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • not half (something)
  • too (something) by half
  • too clever by half
  • too clever, quick, etc. by half
  • too something by half
  • spanked
  • hasn
  • glass
  • half the time
  • half an eye
References in periodicals archive
FORMER Villa star Paul Merson was a great footballer, and he's not half bad as a TV pundit these days.
Writing as a Capricorn, the news that we are not the chosen ones is obviously annoying (so near and yet so far), but not half as annoying as a zodiac-specific ad that was placed last year in Salzburg in Austria.
Not half as scary as White's over-familiar pat on Berg's knee.
My guess is that history books will portray Tony Blair as not half as wonderful as we first believed but not half as black as he's now being painted.
I then went to the ground floor to visit the gift shop; more disappointment, such a small room and not half the gifts like the old one had.
And I tell you what, that Greg Norman is not half the golfer he was.
The mild ridicule is the outcome of a sweet little illusion among many architects that if they really put their minds to it they would inevitably emerge as not half competent artists.
If the music is pretty insipid, the lyrics, drawn from the several volumes of Houellebecq's poetry, are not half bad.
Awarded the MBE in 1978, he told the Queen that his sport was 'not half as dangerous as horses'.
They join a handful of salads, baked potatoes, grilled chicken sandwiches, and selected subs on the short list of fast food that's not half bad.
Sir Albert is credited as being very astute but not half as astute as top civil servant Sir Bob Kerslake.
Why not look at their situation as glass half-full, not half empty?
But not half as gutted as Hugh Grant, Jeffrey Archer, Frank Bough and Angus Deayton were when they realised it should have said Horse.
The NHS was set up for British people, not half the world.
She knows she's partly responsible for Gennie's death - but not half as responsible as Cameron who's all for keeping it zipped.