The act of posting a message on a forum that is so undoubtedly awesome, that you climax numerous times while writing it.
John was so into his carefully worded tyraid against hotgrrl6969, who inadvertantly posted a thread on the wrong section of the message board, that he unintentionally masturposted all over his keyboard.
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.