WordNet (r) 3.0 (2006):
pitty-pat adv 1: as of footsteps; "he came running pit-a-pat down the hall" [syn: pit-a-pat, pitty-patty, pitty-pat, pitter-patter] 2: describing a rhythmic beating; "his heart went pit-a-pat" [syn: pit-a-pat, pitty-patty, pitty-pat, pitter- patter]