Wiz Khalifa and Kanye West have been battling it out on the Internet -- and with comments about "stripper" exes, "owning" someone's child and now ass play -- it's turning pretty ugly ... and graphic.

The Internet bust-up began when Wiz took issue with Kanye changing his new album title from Swish to Waves and wrote some not-so nice comments on Twitter. Kanye was clearly not having any of it and lobbed some hard ones at the rapper, tweeting, "you let a stripper trap you," and, "I know you mad every time you look at your child that this girl got you for 18 years."

Eventually Wiz went quiet -- but his ex lady is lashing out at 'Ye. The outspoken lady tweeted, "Are u mad I'm not around to play in ur a**hole anymore? #FingersInTheBootyA**Bitch."

Well that's more information than we ever needed. These two former flames have been feuding for years -- grow up, get over it or get a room and bang it out and then leave us all alone.