not half bad Definition

bad
adj worse, worst, badder, baddest

slang:
1. Not good.

Thesaurus: faulty, poor, defective, inferior, imperfect, inadequate, shoddy; Antonym: high-quality.
2. Wicked; immoral.

Thesaurus: wicked, evil, vile, wrong, corrupt, base, mean, immoral, naughty, offensive, sinful; Antonym: virtuous.
3. Naughty.
4. Not skilled or clever (at some activity).

Form: bad at something
5. Harmful to them.

Thesaurus: harmful, injurious, hurtful, damaging, detrimental, dangerous, deleterious, unhealthy; Antonym: beneficial.
Form: bad for someone
6. Unpleasant; unwelcome.
7. Rotten; decayed.

Thesaurus: rotten, rancid, decayed, putrid, spoiled, mouldy, noxious, sour, diseased.
8. Serious; severe.

Example: a bad cold
9. Unhealthy; injured; painful.

Example: a bad leg
10. Sorry, upset or ashamed.

Example: feel bad about what happened
11. Not valid; worthless.

Example: a bad cheque
12. slang
Very good.

adverb

(N Amer)
1. colloq
Badly; greatly; hard.
Example: needs the money bad

noun

1. Evil; badness.

Example: take the good with the bad
2. Unpleasant events.

Derivative: badly

See separate entries.

Idiom: go bad

Said especially of food: to spoil; to become rotten or rancid.

Idiom: go to the bad

Said of a person: to become morally bad.

Idiom: in a bad way

Very ill.

In serious trouble.

Idiom: not bad

colloq
Quite good.
Thesaurus: average, passable, reasonable, satisfactory, not half bad, tolerable, fair, moderate, respectable, fair to middling, all right, OK, so-so.

Idiom: not half bad

colloq
Very good.

Idiom: take the bad with the good

To accept unpleasant facts or events along with pleasant ones.

Idiom: too bad

colloq
Unfortunate (often used to dismiss a problem or unsatisfactory situation that cannot, or will not, be put right).
Example: She's still not happy with it, but that's just too bad

Etymology: 13c.