What is this in English?
this in American English
(ðɪs) (pronoun & adjective plural these (ðiz)) pronoun. (used to indicate a person, thing, idea, state, event, time, remark, etc., as present, near, just mentioned or pointed out, supposed to be understood, or by way of emphasis)
Who says this meaning?
idiom. informal. used when you are arguing with someone, to show that you do not accept or agree with what they say: You're the best? Says who?
What's this now meaning?
used for asking someone what they want after they have already asked you about other things.