Knockin' boots is an old western term for having sex. Derived from both he and she stripping down and slipping their boots under the bed which sometimes made a "knocking" noise. Sometimes the boots are/were left on during sex and the boots would knock during all the action.
I think I got drip dick from knocking boots with that hussie Ellie May.
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.