A trip down memory lane, courtesy of Wikipedia:
Joementum is a portmanteau of "Joe" and "momentum". The word was originally coined by 2004 Democratic Presidential candidate Senator Joseph Lieberman, who, shortly before coming in a disappointing fifth in the New Hampshire 2004 Democratic primary, insisted that his campaign was "picking up Joementum." His finish in the primary was later declared to be part of a "three way split decision for third place."
Since then, the term has become popular among some bloggers as a satirical reference to both Lieberman himself and his election efforts, usually referring to the perceived lack of potential for success of a campaign or endeavor. If a candidate is failing to advance in the polls, they are said to be suffering from "Joementum."
Let’s hope Lieberman’s attempt to kill the public option catches some of his patented “Joementum.”