Smothers (b. 1930) was more than a bodyguard. Besides being an efficient guard he became a part of the folklore around Zappa much thanks to his strong personality and unique language. Zappa even wrote a song about him, Dong Work For Yuda.
"He's one of the best guys I done worked for. I done worked for the Rolling Stones, The Beatles, The Beach Boys, Elvis, Frank Sinatra, Dean Martin, Sister Soul, Temptations, I done worked for them all in the last 22 years. Frank is about the be- about the best one."