"___, six, squish, uh-uh, Cicero, Lipschitz" ("Cell Block Tango" lyric) (3)
I believe the answer is:
pop
(Other definitions for pop that I've seen before include "Burst - fizzy drink - modern music - US dad" , "Youthful music, dad(3)" , "'American Dad'!" , "Palindrome of music for the young" , "Thus goes the weasel in children's rhyme" .)