Artificial intelligent assistant

py hy

py hy, int. Obs.
  A representation of laughter; cf. tee-hee.

1589 Hav any Work (1844) 10, I cannot but laugh, py hy hy hy. 1589 Martins Months Minde Nashe's Wks. (Grosart) I. 198 Ha, he, tse, tse, py, hy, see fortunes wheeles, So how, Mad Martin hath turnde vp his heeles.

Oxford English Dictionary

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