あれ何？

that (indicating something distant from both speaker and listener (in space, time or psychologically), or something understood without naming it directly); that person (used to refer to one's equals or inferiors); over there; down there (i.e. one's genitals); period; menses; hey (expression of surprise, suspicion, etc.); huh?; eh?; that (something mentioned before which is distant psychologically or in terms of time)

what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!