The Dark Knight â A fitting centerpiece for any casino floor, this massive movie-themed slot from IGT has been wowing players ever since The Dark Knight was released in theaters in 2008.
Definition of op. 1  1 chiefly US : a set of planned actions for a particular purpose âusually plural military ops [=operations] 2  2 : op art. 3  3 British, informal : a medical operation â see also photo op.
Answer: 'OP' has two common meanings in the 21st century. It will sometimes mean 'overpowered' in the world of online gaming. More commonly, OP means 'original poster' in discussion forums. The original poster is the person who started a discussion thread, and OP is used to refer back to that person as the responses grow.