Broadimage / REX / Shutterstock / Rex USA 1 / 6
Broadimage / REX / Shutterstock / Rex USA 1 / 6

Words matter. Kourtney Kardashian, like every parent, knows that using profanity around her children is not the best parenting. But, there's also one word she won't use around her 4-year-old daughter, Penelope, and that word is "fat."

The three-letter word may as well be a four-letter word in her household.

Earlier this year on "Keeping Up With The Kardashians," Kourtney chastised her mother, Kris Jenner, in one scene for using that word.

"Do I look fat?" Kris asked her eldest child, to which Kourtney replied, "Don't use that word in front of my daughter, please."

"Okay," Kris replied, with slightly mocking laughter.

Kourtney retorted, "My son, he uses that word in front of my daughter all day. It's [what] he calls the paparazzi."

Many blogs applauded the mother of three for her staunch stance against the word "fat."

That episode aired in June, but the reality star told Cosmopolitan magazine in its October issue the basis for that whole encounter.

"There are so many conversations that we have without thinking the kids are listening. I just don't want to start getting anybody self-conscious," she said. "They say if a mother is confident about her body that the daughters are way more likely to not have eating disorders.

She continued, "I'm fine about my body but I'll notice little things. If I'm like, 'Ugh, I hate this outfit! I'm changing!' My daughter will try on tons of outfits before she's happy."

It doesn't help that she's a part of one of the most ubiquitous families around, so millions of eyeballs are on her all the time.

Asked what she misses most about life before fame, she said, "People not judging your every move and commenting on it. But then, we didn't really have social media before, so would that have just been life anyways?"