In case someone doesnt know, most of the people in borat are not actors, its chuppa rustum style movie with only some actors who know whats going on. He uses his crassness to bring out some of the prejudices of people to great comic effect.
Crude but very funny, his speech in some award ceremony (oscars?) for borat was very funny too. There are
other videos too of borat which are not part of movie.
And he does other characters too, but nothing beats borat.