As a kid I couldn't stand the word "gorgeous", which made me think of gorges, in a bad way. (I use it now, though.)

I still cannot handle anything with the cutesy ending "-poo" (as in Witchiepoo, from H.R. Pufnstuf), because of childhood verbal abuse. :/

And like mzrowan, I still wince when I hear my childhood name spoken aloud, even when it's referring to someone else.