1.
Young people sometimes use ~ in front of adjectives or adverbs in order to emphasize them. (INFORMAL)
He has become ~ rich...
= really
ADV: usu ADV adj/adv emphasis
2.
Young people sometimes use ~ in front of nouns in order to emphasize that the thing they are talking about is very good, very large, or very impressive. (INFORMAL)
...the ~ superstar Madonna.
ADJ: ADJ n emphasis