We have some slang for you today.
Word! Or you can also say word up.
This means that you agree with what is being said. It's used mainly by younger adults.
Example 1
A. I'm so hungry. Do you want to get some burgers?
B. Word.
Example 2
A. Wouldn't it be nice to go to Hawaii for a couple of weeks?
B. Word up dawg!
* dawg is slang for friend