Sarah Palin's three-year-old grandson has been filmed using a gay slur against his aunt during the Lifetime reality show "Bristol Palin: Life's a Tripp."

In a clip just released, Bristol's son Tripp calls his Aunt Willow a "faggot" when she wouldn't let him use the pool. "Go away, you faggot. I don't like you," Tripp said. 

After his tantrum the Palin girls, both daughters of social conservative Sarah Palin, shockingly just laugh it off.

"I'm doing a terrible job disciplining Tripp," admitted Bristol. "I know he's going to continue to push the boundaries and push the limits."

Bristol Palin rocked her mother's 2008 Republican vice-presidential campaign when she became an unwed mother at 18-years-old. Tripp's dad, Levi Johnston, hasn't been allowed to see his son since January. 

The new reality show airing on Lifetime gives viewers an inside look into what it's like inside the day-to-day routine. Critiques say perhaps we are seeing too much of what its like to be part of the Palin clan and are questioning Lifetime's decision to keep the ratings-troubled show. 

This isn't the first time the anti-gay slur has gotten the Palin daughters into trouble. Two years ago, Willow used the same slur on Facebook.