The couple, who looked much in love until recently, had a sudden and nasty break up, reported TMZ.
"It's something Tyga did," a source said.
The split comes soon after Kylie, 18, returned from her vacation in Australia.
Kylie is the one, who pulled the plug, and it had something to do with "pressure from the Kardashians," a source close to Tyga said.
Kylie was also absent from rapper's birthday celebration as he turned 26.
The Jenner-Kardashian also failed to mention Tyga's birthday on their social media profiles.