howja

Etymology
"How d'you" becomes  ("howja") by yod-coalescence (whereby /j/ assimilates to /ʒ/) and reduction of the unstressed /u/ (which becomes /ə/).

Contraction

 * 1) * 1920 June 19, P. G. Wodehouse, The Little Warrior, part IX, in Collier's, page 14:
 * “Selby.” ¶ “Howja spell it?” ¶ “S-e-l-b-y.”
 * 1) * 1972, Ian Whitcomb, After the Ball, 2nd Limelight Edition (1994), ISBN 0-87910-063-X, pages 112–113:
 * ‘Howja do! Howja do! Howja do! Hellooooo everybardy!…’
 * ‘Howja do! Howja do! Howja do! Hellooooo everybardy!…’