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1.
When anything has no momentum whatsoever.
Wow, Lieberman's campaign has got some real joementum... It's going down the drain...
by Jack January 29, 2004
 
2.
The essential quality of a flagging political campaign, particularly when conducted by an incumbent who is overly confident of victory. This term is a reference to Joe Lieberman, whose perceived conservatism and tendency to publicly undercut the Democratic Party have led to an alienation of the Democratic base.
Polls suggest that Rick Santorum as Joementum to spare.
by bluedevil July 20, 2006