Third-person singular simple present indicative form of know better

plural of need-to-know

(colloquial, set phrase, rhetorical question, often sarcastic) What a surprise; guess what? / Used other than figuratively or idiomatically: see what, do, you, know.

(rhetorical question) Implies that a statement is based on a guess or assumption rather than on knowledge or evidence.

To be extremely surprised by an event.

(US, vulgar, chiefly in the negative) To have the most basic level of intelligence or common sense.

(idiomatic) To have no common sense; to be ignorant of the most basic facts; to be very confused.

(idiomatic) To know or recognise someone at all.

(colloquial, childish) A retort to a negative accusation, implying that the accuser shares the fault.

(idiomatic) To know all there is to be known about a certain discipline.