The word comes from poker. On tilt, the goal silently shifts from executing the plan to getting the money back, which leads to revenge-trading and overtrading. It is the fastest way to turn a normal losing day into a max-drawdown.
The only reliable cure is stopping. A hard daily loss limit and a rule to walk away after two or three consecutive losses are the usual defenses.
Example: a trader loses 2R on the first trade, immediately doubles size to make it back, loses 4R, and ends the day down 9R against a plan that caps daily loss at 3R.
Related: revenge-trading, overtrading, daily-drawdown, trading-plan