1worst 
/ˈwɚst/ adjective
superlative form of 1bad /ˈwɚst/ adjective 1 a : worse than all others
▪ This is the worst car I've ever bought. ▪ In my opinion, it's her worst book. ▪ It was the worst movie I've ever seen. ▪ His worst quality is his impatience. ▪ This has got to be the worst day of my life. ▪ The worst part of working there is the long commute. ▪ My worst fears came true. ▪ I am my own worst critic. [=I criticize my work more harshly than anyone else] ▪ He lives in the worst area of the city.
b : least skillful, talented, or successful
▪ He is the worst singer I've ever heard. ▪ They're the worst team ever. 2 : least appropriate, useful, or helpful
▪ That is the worst advice I've ever heard. ▪ I'm having the worst luck today. ▪ Leaving now is the worst thing you could do. ▪ He is the worst person to ask for advice. ▪ You've picked the worst time to come over. ▪ She called at the worst possible moment.
▪ This is the worst car I've ever bought. ▪ In my opinion, it's her worst book. ▪ It was the worst movie I've ever seen. ▪ His worst quality is his impatience. ▪ This has got to be the worst day of my life. ▪ The worst part of working there is the long commute. ▪ My worst fears came true. ▪ I am my own worst critic. [=I criticize my work more harshly than anyone else] ▪ He lives in the worst area of the city.
b : least skillful, talented, or successful
▪ He is the worst singer I've ever heard. ▪ They're the worst team ever.
▪ That is the worst advice I've ever heard. ▪ I'm having the worst luck today. ▪ Leaving now is the worst thing you could do. ▪ He is the worst person to ask for advice. ▪ You've picked the worst time to come over. ▪ She called at the worst possible moment.
in the worst way
US, informal : very much
▪ I want a new bike in the worst way.
▪ I want a new bike in the worst way.
worst of all
— used to refer to the least pleasant or appealing part of something that has many bad parts ▪ I forgot my backpack, was late for class, and worst of all, I studied the wrong material for the test.
your own worst enemy — see enemy
