The meme you're referring to is from the movie "Predator" (…

The meme you're referring to is from the movie "Predator" (1987), not one featuring Sylvester Stallone and Dolph Lundgren. It actually features Arnold Schwarzenegger and Carl Weathers. In the scene, their characters, Dutch and Dillon, greet each other with a powerful, exaggerated handshake, showing off their muscular arms. This moment has been widely used in internet culture to represent mutual agreement or collaboration between two strong parties.