On tilt, a bad outcome, an unfair-feeling loss or a run of them turns into agitation, and the agitation starts making decisions. Position size grows, rules are bent, trades are taken to change how you feel instead of to execute a setup.
Tilt is not confined to losing. Overconfidence after a win streak can produce the same loosening of discipline, which is why sizing up after wins is worth checking in a record as carefully as chasing after losses.
The useful skill is early detection. Most traders have personal signs: a faster pace, bigger clicks, skipped checklist steps, an urge to justify a trade rather than evaluate it. Writing down your own list when calm lets you recognise the state while you are in it.
Once recognised, the response should be a decision you made in advance and can carry out without thinking: stop trading for the session, cut size to the minimum, or walk away for a fixed time. Trying to reason your way back to composure while still exposed to the market rarely works.
Naming the feeling in a single word has a small cost and gives the review something to work with afterwards.