Typically used as a insult, "Dingeringer" means a kangaroo that has gone rabid. The origin of this word is derived from a tf2 game where someone misspoke and said "Dingeringer" from "Dead Ringer".
George: "Oi watch out the is a rabid kangaroo."
Rich: "you mean a Dingeringer."
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.