Is red bull bull pee

No. This is an urban legend. Red Bull energy drink contains taurine, a sulphuric acid. This acid was first isolated from a bull's bile in 1827 by German scientists. This is the source of the urban legend.

Taurine is added because it is believed to be an energy source for some people. Given that this drink is supposed to be for energy, it is more likely that any "energy" is derived from the caffeine and sugar present in the formula than from the Taurine.