Fenkta jaa beta, main lapet rha hoon!
See this video from the classic comedy Andaz Apna Apna.
What do you call this act of lambi lambi fenknaa in English?
The word is bluster.
So, we can say, in the scene above, both Aamir Khan and Salman Khan blustered about who they were.
Content courtesy Jayway Coaching.