Green’s Dictionary of Slang

whaddaya whaddaya? phr.

[lit. ‘what do you? what do you?’]

a general interrog. phr.

[US]T. Wolfe Bonfire of the Vanities 369: Whaddaya whaddaya? . . . No kiddin’?
D. Mamet We’re No Angels 74: ned: They got the waterfront sewed tighter than a football. jim: Hell, whaddaya, whaddaya, Neddy. We’re not going back.
S. King Waste lands 120: ‘Whaddaya-whaddaya?’ the driver yelled, but Jake ignored him.