|“||Name's Old Man Waterfall, but most folks just call me "Old Man."||”|
–Old Man Waterfall, A Taste of Freedom
Old Man Waterfall (born May 21, 2906 - December 22, 3003) was the father of Free Waterfall, Sr., grandfather of Free Waterfall, Jr. and great grandfather to Free Waterfall III, Hutch Waterfall, and Frida Waterfall. He was the husband to multiple wives and at least one husband. He was very patriotic and has participated in many wars. He also practices polygamy and bisexuality.
Old Man Waterfall first appears in "The Birdbot of Ice-Catraz", vowing to avenge his son's death.
He later appears during the episode "A Taste of Freedom", in which he offers to represent John A. Zoidberg as a lawyer during his court case. The judges agree to let Zoidberg go, so long as he apologises for his crime, eating Earth's flag. However, he refuses and Earth is invaded and its people enslaved by Decapodians. Old Man Waterfall is killed while battling their Mobile Oppression Palace, which inspires Zoidberg to put an end to the occupation. Before he expired, he requested a Satanic funeral.
- In the French version of "Futurama", his name is Grand-père Waterfall or Grandfather Waterfall.
- His appearance and voice borrow generously from the Looney Tunes character Yosemite Sam.