in the worst way
Adverb
Meaning
(chiefly US and Canada, idiomatic) Urgently; desperately; to an extreme degree.
I need a drink of water in the worst way.
Used other than figuratively or idiomatically: see in, the, worst, way.
Source: en.wiktionary.orgSynonyms
Examples
When one has finished building one's house, one suddenly realizes that in the process one has learned something that one really needed to know in the worst way - before one began.
I wanted to get out of Mississippi in the worst way. Go back? What I want to go back for?
At the age of 25 most people were finished. A whole god-damned nation of assholes driving automobiles, eating, having babies, doing everything in the worst way possible, like voting for the presidential candidate who reminded them most of themselves.
Once I decide to do something, I want to win in the worst way. I will do anything within the law to win.
All this may sound touchy-feely in the worst way, but Jonze is trying to get at how we seek romantic connection in this brave (or not so brave) new world.
Crushing on grapefruit Perrier in the worst way.