1. A person who is unable or unwilling to be shown how to tweet on Twitter. Most often a technologically challenged individual, usually associated with advanced age.
2. The complete fear of Twitter or anything associated with it.
Teen: My dad is such a tweetaphobic! He doesn't even have a cell phone!!!! HE IS SO 50's!!!!!
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.