(N) a mysterious person who shows up on your facebook friends list and you have no idea where they came from or who they are; are known as 'fimples'. Removing said person is known as "popping a fimple".
by TheRealMcCoy August 03, 2009
by marshmellow23 November 18, 2012
My boyfriend is a Fimple
by Evans September 17, 2016