Why is Tyga unhappy with girlfriend Kylie Jenner?

Rapper Tyga is not happy about his girlfriend Kylie Jenner's habit of posting everything on Snapchat.

In new videos posted Saturday, the 25-year-old rapper told Kylie that he just didn't want to be on the video messaging application, reports aceshowbiz.com.

"Oh my god! Why do you post everything? Damn, you're killing me!" Tyga exclaimed after he realised that Kylie took a video of him using Snapchat.

While Tyga looked annoyed by Kylie's behavior, the 18-year-old reality TV star could be heard laughing at him.

Another video showed Tyga plotting a revenge to Kylie.

"You wouldn't like that if I posted you and s**t, right?" he said.

Kylie then started using her foot to playfully mess with him while asking him to stop explaining her plan.

The rapper then said: "So stop filming me on Snapchat."

Following the second video, Kylie posted another video showing her teasing her boyfriend about his sudden silence.

Kylie playfully put her foot on Tyga who looked focused reading something on his mobile phone.

"Why so mad?" she asked. "I'm not mad, I just don't want to be on Snapchat. Damn," Tyga said while smiling.

Tyga seemingly wants some privacy after a Snapchat video posted earlier in the week sparked engagement rumours. At that time, he allegedly referred to Kylie as his fiancee.

However, the "Keeping Up with the Kardashians" star soon denied the rumours, saying that he was only poking fun at a video he posted on photo-sharing app Instagram earlier that day.