osifu Share definition Flag Osifu is a condensed way to say "oh s***, I f***ed up." It was started by Levi Kimber and Jacob Bakko in the year 2013. I had an osifu moment. Levi just osifued. osifu by bobdawkinsodst August 11, 2015 0 0 Get merch Get the osifu mug. Buy Now — $32.95 See more merch