What is this language game my daughter and her friends speak?

I heard my 14-year-old daughter and her friends talking to each other using a word-changing language game, like pig latin, but much harder for me to understand. I asked my daughter's friend to say something and I recorded it.

Listen here

She said it was called Finglish but a Google search makes me think she is either mistaken or tricking me. Can you tell me what it's called and what the rules are? I think it involves adding a lot of F's in between syllables.