I'm one of those annoying sods who either bursts into song or quotes lines from films at random moments picking up on what someone has just said (I know, it's like a compulsion, definitely a habit)
Anyhow, someone mentioned the name "Katie" and into my head popped the following and I can't for the life of me remember where it's from.
It's a man saying (or rather taking the piss) out of someone with a stutter (sorry for non PCNess) called Kate/Katie with a " K..K...K...Katie"
Any ideas? Told you it was vague. However the "K" is pronounced "Kuh" and it's 100% in an Australian accent.
I think it's an old film/tv, as in 1980/1990's.