1.the least favorable outcome;
the worst that could happen
2.the greatest damage or wickedness of which one is capable;
the invaders did their worst
3.the weakest effort or poorest achievement one is capable of;
it was the worst he had ever done on a test
4.(superlative of `bad') most wanting in quality or value or condition;
the worst player on the team
5.to the highest degree of inferiority or badness;
She suffered worst of all
1.defeat thoroughly;
He mopped up the floor with his opponents