Lucky you, you're younger than me!
Billy Carter was the notorious and comical fun-loving brother of President Jimmy Carter (1976-1980). There were a few interesting episodes, a diplomatic trip to Libya and an incident of public urination. Then, great American free enterprise - Billy Beer. Can collectors will remember. Hey, it was the 1970s. Half the country was baked then.
From Wikipedia: "In 1977, he endorsed Billy Beer capitalizing upon his colorful image as a beer-drinking Southern boy that had developed in the press when his brother ran for President. Carter's name was occasionally used as a gag answer for a Washington, D.C., trouble-maker on 1970s episodes of The Match Game. Carter was known for his outlandish public behavior. For example, he once urinated on an airport runway in full view of the press and dignitaries."
Actor Gary Busey played the role on Saturday Night Live, beer can in hand. Think Bill Clinton without the Yale and Georgetown degrees.