what's the matter? / what happened?

what kind of person, every kind of person

what did you say?

what's up?

(slang) what is that?

who

not; not too (spoken)

what is the gimmick

no problem at all

(pronoun) who; whom ; (noun) so-and-so; what's-his-name; what's-her-name

everything is

(slang) (of object) everything is fake; all are fake; (of event) a phrase to express how resolute someone is to stand one's ground which cannot be compromised, with an intention somewhat similar to telling others not to even bother; to describe a situation where there are no solutions or alternatives: there's no way out / cannot be helped; a phrase used to ascertain others any alternatives are pointless / ineffective

able to do anything

what's up; what is; every kind of thing

a person or a group who is not known or recognizable

"what the hell?"; an intense way of asking "what"

(phrase) to indicate that something is unimportant or unnecessary , similar to the meaning of "there is no need to…"; "why bother…"

absolutely; needless to say (spoken)

Something

(verb) what are you doing?; (interrogative adverbs) why

what are you doing?

to describe two people do not have much to talk

nothing; it's nothing; not very; not particularly

nothing; have nothing; it's fine

nothing left to worry about

does not matter much, not important

nothing really left or remain

nothing special

to be demanding unreasonably / indecisive

very easy; a piece of cake; "so what if…" (implying that there is a certain risk of something happening)