That is Minnesota Golden Gopher “The Nature Boy” Ric Flair, I think during his World Championship Wrestling days in the late 70s/early 80s.
he yelled “woo” incessantly and it was tons of fun
edit to add, the WWE (then WWF) logo at the bottom makes we wonder if the gif might have been a bit later in Flair’s career as he joined the WWF in the mid-80s