A colloquial Hindi slang(also used as a loan word in English) which typically refers to a person who continuously and shamelessly brags and lies about things/deeds far beyond his capacity.
Mainly used as an instrument of mockery/ridicule to expose the Indian Right Wing leader(s) who commonly lie /brag by fudging development statistics in their governments.
FICCI meet me Narendra Modi ne itni besharmi se jhooth bola ki uski media bhi use Twitter me Feku naam milne se bacha nahi payi
(Narendra Modi lied so shamelessly at the FICCI meet that even his lapdog media couldn't stop him being christened Feku on Twitter)
Agar koi RSS wala gujarat ke bare me kahe, usse puchna woh APCO paid Feku dalal hain kya !!
(If a RSS guy brags about Gujarat, ask him if he is another Feku APCO paid pimp)