When you are on a desperate trip for food from McDonalds, and you will not settle or give up until that certain food (none other) is in your stomach, hence the "Dash" part. This often follows with a "Maccy Rush" (the feeling you get after you eaten McDonalds food)
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.