Obamamentum is just the tip of the iceberg when it comes to neologisms coined from Barack Obama's name. Chris Wilson of Slate presents the Encyclopedia Baracktannica, a random Obamalingo generator available as a widget. Smith writes:
It's hard to imagine that Barack Obama would be as big of a phenomenon if his name were, say, Tom Smith. As numerous fans, detractors, reporters, and bloggers have demonstrated, it's a name that lends itself to neologisms—everything from Barackstar to Obamania to Omentum.
I especially like obamanomenon, obamalaise ("the hangover resulting from repeated listenings to the 'Yes We Can' montages"), and Barack to the Future ("2008 film in which Barack Obama uses the flux capacitor to defy traditional partisan politics, race, gender, the 'Clinton Attack Machine,' and the space-time contiuum"--thanks to Timothy O'Brien for that humdinger!).
And yes--as Orange pointed out in a comment on my previous post, and as Dr. James Peykanu informed Slate--omentum is the anatomical term for a "big membrane in the belly that serves as the root [sic] by which the blood to the intestines flows."