Heffer Wolfe is a fictional character on the television series Rocko's Modern Life and the comic book series of the same name. Tom Kenny provided the character voice, who also voiced Wayne Cramo in The Cramp Twins. His catchphrase, which can be heard in the series' opening sequence, is "That was a hoot!" He is a 19-year-old American steer. His name is a pun of the word "heifer" which is a synonym for a young cow.