Jeremiah Johnson nodding gif is a very popular reaction gif used to express approval and satisfaction when something comes together. The person in this gif believe it or not it is  Robert Redford. This gif comes from a 1970s film directed by Sydney Pollack and starred by Robert Redford, based on the Mountain Man by Vardis Fisher. Pretty cool movie, you should watch it if you like western type movies

 

Watch the clip of Jeremiah Johnson nodding on youtube