1 definition by Pat Maygroyne
when you are getting your dick sucked and your about to bust a load, you slap the bitch in her face. She will look to the side and looks right back at you saying what the fuck. You than bust a load in her face and say i FSU or Fuck Shit Up.
when i asked derek how the party went last night with lisa he just answered i Fucked Shit Up FSU. I understood what he meant and walked away laughing.
by Pat Maygroyne May 9, 2009