Mark Cuban -- Kiss (Cam) and Make Up ... with Steve Ballmer

Seems Mark Cuban buried the hatchet with Clippers owner Steve Ballmer Thursday night ... 'cause last night, they were blowing kisses to each other on kiss cam.

Cuban and Ballmer were both at Staples Center for the first time their teas faced off since the infamous DeAndre Jordan incident over the summer ... where D.A. backed out of a deal with the Mavs and re-signed with the Clips.

You knew there was gonna be tension between the owners ... but nothing a little smoochie smooch couldn't fix, as captured by our friends at BSO.