A personal best is the finest result you yourself have ever achieved. Set a personal best, a new personal best, beat your personal best.
It is what makes an individual sport worth entering when you will never win, and clubs post it beside the winner's time for that reason. The abbreviation is PB. In parkrun and similar events it is announced as loudly as any victory.
1phrasepersonal bestThe best result a person has achieved themselves.
“She knocked two minutes off her personal best in the final race.”
personal best is a record.
Also accepted in games: pb
Practised in Sports & Fitness, Swimming & Diving