Fahfahtation is a slang word used for "lying" "exagerrating" "making up things" or you can even use it for other things as this word fits into most people's everydy lives.
Different forms of the word:
Fahfatation
fahfet
fahfating
"Justin bieber is gay" Lamastop fahfahtating
or "bro, enough with the fahfahtation.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi