I don't know how accurate this is, but the encyclopedia article claims George Bush's nick name in the Yale fraternity Skull and Bones was "The Beast".
Nicknames of selected Bonesmen
- William Howard Taft: Magog
- F. O. Matthiessen: Little Devil
- Averell Harriman: Thor
- Henry Luce: Baal
- Briton Hadden: Caliban
- Archibald MacLeish: Gigadibs
- McGeorge Bundy: Odin
- Potter Stewart: Crappo
- George W. Bush: The Beast
- William F. Buckley: Cheevy
- Anson Phelps Stokes: Achilles
- Reuben Holden: McQuilp
- Charles Seymour: Machiavelli
- Donald Ogden Stewart: Hellbender
I personally just picture a heavy drinking party machine everyone calls the beast, just curious what other people's thoughts are.