This one is derived from the hindi word 'bakwas' meaning nonsensical bluff.
Fuckwas is the greater degree of bakwas,
in fact its the most 'fuck-all' kinda bluff which irritates the listener or reader.
'All i am trying to explain is the viability of our new initiative..Why don't you look into it?!'
"Its all fuckwas.. dont tell it to anyone if you wana save your face.."