What do these new generation words imply?

Geez -To me it means the person is complaining it is similar to saying shyt. I know right? -this popular phrase is a sign that the person suffers from co-dependency or even psychopatic tendancies, it is similar to - you know, which is an old fashioned form of the same statement. Can give you give other examples of lingo and what they mean to you?Do you join in wth popular phrases and repeat them ?