The phrase "swift boat" describes a Vietnam-era patrol boat, but it is increasingly being used to describe the political tactic of using a concentrated media effort to discredit a person or idea.
The phrase developed out of the 2004 U.S. presidential election, when a group called "Swift Boat Veterans for Truth" attempted to suggest that Democratic candidate John Kerry lied in order to earn two Purple Hearts and a Bronze Star during the Vietnam War. The group, as it turns out, was funded primarily by people who also frequently donated millions of dollars to the Republican party. Swift Boat Veterans for Truth was formed for the sole purpose of discrediting Kerry's Vietnam War service and has not been heard from since the end of the election.
From Wired magazine: "Phrases like 'junk science' and 'sound science' are creations of the right in its effort to 'swift boat' research it doesn't like."
An acronym which stands for "Slams Elbow Down, Hand Extended." The elbow is placed forcefully on a tabletop or other surface at a thirty-five degree angle or greater, and the forearm is extended at an angle of no greater than thirty-five degrees with the hand pointing forward, parallel with the tabletop. A SEDHE is used in conversation or debate to emphasize a point or to direct conversation to a particular person. The degree of force of the SEDHE is directly proportional to the importance of the subject.
"George gave Raúl a SEDHE to emphasize his point about preserving endangered snails."