What does FFF stand for?

Answer 1

It's the sound the Rage Guy makes when he's raging.

Answer 2

FFF or #FFF stands for Foreign Females (Internet slang, chat)

An Abbreviation used by U.S. teens/young people to refer to a non-U.S. woman or girl who has a small breast size and who behaves in a submissive, envious and adoring way when she meets U.S. women/girls with a more feminine body shape and a larger breast size than her own. This quite a rude internet slang Abbreviation is commonly used by Caucasian U.S. teens (Bulletin Boards, Chat).

Answer 3

fffe means feind feind for ever