Here's a breakdown:
* Ang - The (definite article)
* Dakilang - Great
* Magpapanggap - Pretender
However, depending on the context, other translations might be more appropriate. Here are some alternatives:
* Ang Dakilang Manloloko - The Great Deceiver
* Ang Dakilang Manunumbat - The Great Imposter
* Ang Dakilang Nagkukunwari - The Great One Who Pretends
The best translation would depend on the specific meaning you want to convey.