Levi Johnston is seeking custody of son Tripp with ex-fiancee Bristol Palin after he viewed her reality show, "Bristol Palin: Life's a Tripp" and found her not to be a fit mother.

Palin, 21, made headlines last week after he r Lifetime reality show aired an episode in which 3-year-old Tripp appears to say a gay slur to aunt Willow Palin during a tantrum (Palin denies her son used that word, claiming he used another f-word. Decide for yourself by watching the video below.)

The episode of "Bristol Palin" Life's a Tripp" has prompted Johnston, who had been engaged twice to Sarah Palin's daughter, to seek custody of Tripp.

"I want full or half custody of Tripp. His room is already set up in my house and just waiting for him," Johnston said in a statement to ABC News.

Johnston, who had posed for Playgirl, had a short-lived bid for mayor of Wasilla, Alaska and wrote a tell-all book about his experiences with the Palins, has visitation rights.

The 22-year-old Johnston, whose girlfriend, Sunny Oglesby, is pregnant, is incensed after watching "Bristol Palin: Life's a Tripp."

He said his 3-year-old son "deserves a better family.

"I love my son more than anything ... and I will do whatever it takes to make sure he is raised the right way," Johnston told TMZ.

Bristol Palin raised eyebrows when the episode of her lifetime show aired showing Tripp was out of control. She admitted she had difficulty disciplining the 3-year-old.

Tripp told his aunt, "Go away, you f-----!" during the episode.

While Johnston's girlfriend has yet to give birth, the couple has already decided on a name for the girl: Breeze Beretta, naming her after the gun company.