what do you want to talk about - or depending of the tone of the voice: what are you talking about? -
Quoi? in French is "What?" in English.
what do you have-
C'est pour quoi? in French means "What's it for?" in English.
C'est quoi la falaise? in French means "What is the cliff?" in English.
'what did you want ?'
'what is 'friends' in French'
À propos de quoi tu parles? in French means "What are you talking about?" in English.
"I don't know what" is an English equivalent of the French phrase Je ne sais quoi. The pronunciation will be "zhuhn seh kwa" in French.
"de quoi veux-tu parler ? de quel sujet veux-tu parler ?"
"What's love?" is an English equivalent of the French phrase C'est quoi l'amour? The question translates literally as "It's what (the) love?" in English. The pronunciation will be "sey kwa la-moor" in French.
You can say "De quoi veux-tu parler?" in French to ask "What do you want to talk about?"
"Anything magificent?" and "What's magnificent?" are just two English equivalents of the French exclamatory phrase Quoi de magnifique? The pronunciation will be "kwah duh ma-nyee-feek" in French.