Just heard another one last night, during a child-parent hug interaction. It sounded like the parent muttered "hate you" at the kid!

In the Sims 2 version of a Lily Allen song it sounds she's saying ''put the weed in your bra'' O.o

Whenever the toddler plays with the toy that earns logic points I hear "What the fuck"

When an adult female (the more feminine voice) teaches the bird to speak I hear Walkus

I hear children say we and oh no when playing with the doll house

I believe I heard a female sim say pourquoi while playing a game can't remember which, it is French for why? (It's been years since I was in French class so forgive me if it's poor)

Yesterday one of my sims was placing his infant on the floor after feeding and changing her. I heard him say "there you go" to her as he laid her down.

When I hear one sim yelling at another, I hear:
"Steering ... and drove... a llama."
and in another one:
"Hot chocolate is the bomb."
and:
"You crapped it!"

I've heard them say "Belinda McCoy" ... don't remember who said it or why.