someone who has poor aim and misses even easy opportunities, particularly in sports

Indicates that the speaker identifies with a prior statement to a much lesser degree (or not at all) than the other person. / Indicates that one factor is much more relevant or important than another.

The process or result is not worth the effort.

plural of not yet

Synonym of not the sharpest tool in the shed.

(intransitive, stative, idiomatic) To be in a state of doing or being about to do something that one is likely to regret; usually unknowingly or forgetfully.

(Australia, slang) Not very good; unimpressive; of poor quality.

not mentally sound; unintelligent

(dated) A societal revolution will happen genuinely and in real life, and will not be caught on film.

Used to distinguish emergency procedures from those which are just rehearsed. / (informal, often humorous, by extension) Used to make an announcement or draw attention to a fact.