Define Fnaf2 Meaning

Means Five Nights At Freddys 2.
The official prequel to Five Nights At Freddys 4, which is a prequel to Five Nights At Freddys, which is a prequel to Five Nights At Freddys 3, despite Five Nights At Freddys 2 being the 2nd game.
It features the 5 Original animatronics, along with 4 toy animatronics, and 2 new animatronics.
If Five Nights At Freddys 1's animatronics, 2's animatronics 3's animatronis, and 4's animatronics (also counting the Halloween Edition's animatronic) are counted, all 4 games have a total of 33 animatronics. Five Nights At Freddys 2 has grown popular by FNAF fans. Also, youtubers, being Pewdiepie, Markiplier and Jacksepticeye, respectively, have played Five Nights At Freddys 2. Markiplier managed to beat 10/20 mode, naming himself the king of Five Nights At Freddys (he reclaimed his crown in Five Nights At Freddys 4)