ETYM Old Eng. werst, worste, wurste, AS. wyrst, wierst, wierrest. Related to Worse.
(Superlative of 'bad') Most wanting in quality or value or condition.
(Homonym: wurst).

To the highest degree of inferiority or badness.

1. The greatest damage or wickedness of which one is capable.
2. The least favorable outcome.
3. The weakest effort or poorest achievement one is capable of.

ETYM See Worst (adj .).
To colloquial usage; defeat thoroughly; SYN. pip, mop up, whip, rack up.