Combination of GIS (Google Image Search) and Kung-Fu. Gisfu is the ability use a web search to quickly find relevant and usually humorous images to use in on-line forums.
I know saw a picture of a one-armed midget cowboy riding a llama naked through the streets of Bangkok, but I can't find it right now. My gisfu is weak today.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.