What'd

This a contraction of "what did".

go cold turkey

"Going cold turkey" means quitting something that you've been addicted to suddenly. It's one way to end an addiction. It's painful for a while, but some people think that it's easier to successfully quit a habit if you "go cold turkey".

This expression is most often used to talk about quitting smoking.

try to (do something)

The phrase "try to ___" can be used when you fail:

I've tried to quit smoking on a number of occasions, but it's never worked.

But you can also use "try to" to talk about something that was successful. When you do this, "try to" usually introduces a technique that you used. The example at top falls into this category. Here's another example:

I tried to keep the heat low, so that the bottom doesn't get burnt.

ease out of (something)

This means to slowly reduce the amount of something until it's completely stopped.

I have about a month left at my job, so I'm starting to ease out of it.

The country is slowly easing out of its recession.

The expression "ease into (something)" also exists.