Tilt is usually a term in video games (though it can really be used in any activity or hobby). Tilt is an emotional state when doing the exact same thing activity over and over produces negative results. It's an emotional breakdown and fustration of your hard work not resulting in the success that you crave so desperately. When you or someone is in a tilt state of mind, the best thing to do is take a break from that activity and try not to think about it as much.

Corrosive: Dude I lost three sets of teams and it's all cubix's fault.

Pillemarisk: Dude you're on tilt. Take a break from Cultris for a bit man.