did you want something? can I help you? what do you want? did you need me?

use (noun) / a task, business, an errand

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

What? What did you say?

whatchamacallit, X

for the use of, for the purpose of, in case of

use; effect; means

what

What?, Huh?

what / that thing (used in place of words you can't remember at the moment.)