Fuckface grandpa is used to define an old person, not so good looking who hits on young, pretty women
Girl to her friends: I met a real fuckface grandpa at work! He wanted me to show him how to get to the 15th floor in my office!
by tuffy08 May 7, 2014
Get the Fuckface Grandpamug. 
Get the FuckFacemug. means a face that is made when a woman during sex lets go and has a orgasm and when the fuckface screws up and your toes are throwing gang signs..gotta fuckface love it
by you like i love November 28, 2016
Get the Fuckfacemug. A person being rude towards you or someone you care about, that is generally a "dick", "asshole", or whatever you want to call them.
"Shut up, fuckface."
by Skyfall333 August 1, 2017
Get the Fuckfacemug.