ff or ff.

1. Fecerunt (Latin), (they) did it or made it
2. Folios (printing)
3. Following pages, lines, etc
4. Fortissimo (music)

FF

1. Form feed (computing)
2. French franc or francs

• bleats
• bleb
• blebs
• bled
• blee
• bleed
• bleeder
• bleeders
• bleeding
• bleeding edge
• bleeding-edge
• bleeding heart
• bleeding hearts
• bleedings
• bleed like a pig
• bleed like a stuck pig
• bleed nipple
• bleed nipples
• bleeds
• bleed valve
• bleed white
• bleep
• bleeped
• bleeper
• bleepers