Do you remember the 90s?
This meant something was cool or awesome... not overweight.
A slacker, good for nothing guy.
It didn't mean "complaining" at this time. It meant something was actually pretty awesome.
This meant something was the best.
Pretty much means the same thing as today. Think about the 1st verse of "All Star" by Smash Mouth.
Something you'd say after a sentence that was false
Going crazy, or freaking out.
Still used today, but in the 90s it was always used when you had nothing else to say as a comeback.
You'd say this when you just didn't want to hear what someone else was saying to you.