(music) to fail to keep the rhythm and gradually increase tempo over the course of a performance; to rush

What? What did you say?

whatchamacallit, X

(polite) do you believe in God?

what

What?, Huh?

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

what number, how many (used with a counter) / (used with も) many (used with a counter)

something

nothing