When it's been in use for years, the term was popularised while in the twentieth century by heavyweight boxing champion Muhammad Ali, who, in 1964, declared himself "the greatest" just after defeating Sonny Liston. The phrase 'finest of all time' is bandied about a whole lot in sport these days. https://t-l-k-o-nh-c-i-599864.blogrenanda.com/46593181/the-definitive-guide-to-what-is-goat-in-football