In a reckless or rash state; acting without proper care, attention, or consideration. Originally used in reference to poker players who begin making reckless decisions after experiencing either good or bad luck. Primarily heard in US. The team has been on tilt after losing their quarterback to a penalty, making foolish decisions that have cost them a number of points. The president has been on tilt ever since allegations of tax fraud began derailing her efforts to get a tax overhaul passed in Congress.